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Vulnerability Details :

CVE-2026-4712

Summary
Assigner-mozilla
Assigner Org ID-f16b083a-5664-49f3-a51e-8d479e5ed7fe
Published At-24 Mar, 2026 | 12:30
Updated At-13 Apr, 2026 | 13:50
Rejected At-
Credits

Information disclosure in the Widget: Cocoa component

Information disclosure in the Widget: Cocoa component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
ā–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:mozilla
Assigner Org ID:f16b083a-5664-49f3-a51e-8d479e5ed7fe
Published At:24 Mar, 2026 | 12:30
Updated At:13 Apr, 2026 | 13:50
Rejected At:
ā–¼CVE Numbering Authority (CNA)
Information disclosure in the Widget: Cocoa component

Information disclosure in the Widget: Cocoa component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Affected Products
Vendor
Mozilla CorporationMozilla
Product
Firefox
Versions
Unaffected
  • From 140.9 through 140.* (rpm)
  • From 149 through * (rpm)
Vendor
Mozilla CorporationMozilla
Product
Thunderbird
Versions
Unaffected
  • From 140.9 through 140.* (rpm)
  • From 149 through * (rpm)
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Josh Aas
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://bugzilla.mozilla.org/show_bug.cgi?id=2017666
N/A
https://www.mozilla.org/security/advisories/mfsa2026-20/
N/A
https://www.mozilla.org/security/advisories/mfsa2026-22/
N/A
https://www.mozilla.org/security/advisories/mfsa2026-23/
N/A
https://www.mozilla.org/security/advisories/mfsa2026-24/
N/A
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=2017666
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-20/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-22/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-23/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-24/
Resource: N/A
ā–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-200CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Type: CWE
CWE ID: CWE-200
Description: CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Metrics
VersionBase scoreBase severityVector
3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
ā–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@mozilla.org
Published At:24 Mar, 2026 | 13:16
Updated At:13 Apr, 2026 | 15:17

Information disclosure in the Widget: Cocoa component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Secondary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Type: Primary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Type: Secondary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CPE Matches

Mozilla Corporation
mozilla
>>firefox>>Versions before 140.9.0(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
Mozilla Corporation
mozilla
>>firefox>>Versions before 149.0(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
Weaknesses
CWE IDTypeSource
NVD-CWE-noinfoPrimarynvd@nist.gov
CWE-200Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: NVD-CWE-noinfo
Type: Primary
Source: nvd@nist.gov
CWE ID: CWE-200
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://bugzilla.mozilla.org/show_bug.cgi?id=2017666security@mozilla.org
Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-20/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-22/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-23/security@mozilla.org
N/A
https://www.mozilla.org/security/advisories/mfsa2026-24/security@mozilla.org
N/A
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=2017666
Source: security@mozilla.org
Resource:
Permissions Required
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-20/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-22/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-23/
Source: security@mozilla.org
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-24/
Source: security@mozilla.org
Resource: N/A

Change History

0
Information is not available yet

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Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
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Updated-25 Nov, 2025 | 17:50
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
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KEV Action Due Date-Not Available

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Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.Debian GNU/LinuxRed Hat, Inc.
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CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CWE ID-CWE-346
Origin Validation Error
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Matching Score-6
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Matching Score-6
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CVSS Score-6.5||MEDIUM
EPSS-1.54% / 72.32%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

If the "app.support.baseURL" preference is changed by a malicious local program to contain HTML and script content, this content is not sanitized. It will be executed if a user loads "chrome://browser/content/preferences/in-content/preferences.xul" directly in a tab and executes a search. This stored preference is also executed whenever an EME video player plugin displays a CDM-disabled message as a notification message. This vulnerability affects Firefox < 59.

Action-Not Available
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CWE ID-CWE-200
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CVE-2018-5132
Matching Score-6
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ShareView Details
Matching Score-6
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CVSS Score-6.5||MEDIUM
EPSS-1.49% / 71.39%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The Find API for WebExtensions can search some privileged pages, such as "about:debugging", if these pages are open in a tab. This could allow a malicious WebExtension to search for otherwise protected data if a user has it open. This vulnerability affects Firefox < 59.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2018-5118
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-5.3||MEDIUM
EPSS-1.58% / 72.93%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The screenshot images displayed in the Activity Stream page displayed when a new tab is opened is created from the meta tags of websites. An issue was discovered where the page could attempt to create these images through "file:" URLs from the local file system. This loading is blocked by the sandbox but could expose local data if combined with another attack that escapes sandbox protections. This vulnerability affects Firefox < 58.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2018-5140
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-5.3||MEDIUM
EPSS-1.32% / 67.80%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Image for moz-icons can be accessed through the "moz-icon:" protocol through script in web content even when otherwise prohibited. This could allow for information leakage of which applications are associated with specific MIME types by a malicious page. This vulnerability affects Firefox < 59.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2018-5114
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-5.3||MEDIUM
EPSS-1.58% / 72.93%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

If an existing cookie is changed to be "HttpOnly" while a document is open, the original value remains accessible through script until that document is closed. Network requests correctly use the changed HttpOnly cookie. This vulnerability affects Firefox < 58.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2018-5134
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-7.5||HIGH
EPSS-1.68% / 74.51%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

WebExtensions may use "view-source:" URLs to view local "file:" URL content, as well as content stored in "about:cache", bypassing restrictions that only allow WebExtensions to view specific content. This vulnerability affects Firefox < 59.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2018-5115
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-7.5||HIGH
EPSS-2.58% / 83.60%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

If an HTTP authentication prompt is triggered by a background network request from a page or extension, it is displayed over the currently loaded foreground page. Although the prompt contains the real domain making the request, this can result in user confusion about the originating site of the authentication request and may cause users to mistakenly send private credential information to a third party site. This vulnerability affects Firefox < 58.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2018-5131
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-5.9||MEDIUM
EPSS-2.32% / 81.69%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-25 Nov, 2025 | 17:50
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Under certain circumstances the "fetch()" API can return transient local copies of resources that were sent with a "no-store" or "no-cache" cache header instead of downloading a copy from the network as it should. This can result in previously stored, locally cached data of a website being accessible to users if they share a common profile while browsing. This vulnerability affects Firefox ESR < 52.7 and Firefox < 59.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.Debian GNU/LinuxRed Hat, Inc.
Product-firefoxubuntu_linuxenterprise_linux_desktopenterprise_linux_serverdebian_linuxenterprise_linux_server_eusenterprise_linux_workstationenterprise_linux_server_ausFirefoxFirefox ESR
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2018-5137
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-7.5||HIGH
EPSS-1.68% / 74.51%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A legacy extension's non-contentaccessible, defined resources can be loaded by an arbitrary web page through script. This script does this by using a maliciously crafted path string to reference the resources. Note: this vulnerability does not affect WebExtensions. This vulnerability affects Firefox < 59.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2018-5108
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-4.3||MEDIUM
EPSS-1.17% / 64.06%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A Blob URL can violate origin attribute segregation, allowing it to be accessed from a private browsing tab and for data to be passed between the private browsing tab and a normal tab. This could allow for the leaking of private information specific to the private browsing context. This issue is mitigated by the requirement that the user enter the Blob URL manually in order for the access violation to occur. This vulnerability affects Firefox < 58.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2022-45414
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-8.1||HIGH
EPSS-0.53% / 41.55%
||
7 Day CHG~0.00%
Published-22 Dec, 2022 | 00:00
Updated-15 Apr, 2025 | 15:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

If a Thunderbird user quoted from an HTML email, for example by replying to the email, and the email contained either a VIDEO tag with the POSTER attribute or an OBJECT tag with a DATA attribute, a network request to the referenced remote URL was performed, regardless of a configuration to block remote content. An image loaded from the POSTER attribute was shown in the composer window. These issues could have given an attacker additional capabilities when targetting releases that did not yet have a fix for CVE-2022-3033 which was reported around three months ago. This vulnerability affects Thunderbird < 102.5.1.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdThunderbird
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2013-1729
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-2.6||LOW
EPSS-1.23% / 65.87%
||
7 Day CHG~0.00%
Published-18 Sep, 2013 | 10:00
Updated-29 Apr, 2026 | 01:13
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The WebGL implementation in Mozilla Firefox before 24.0, when NVIDIA graphics drivers are used on Mac OS X, allows remote attackers to obtain desktop-screenshot data by reading from a CANVAS element.

Action-Not Available
Vendor-n/aMozilla CorporationApple Inc.
Product-firefoxmac_os_xn/a
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2020-6812
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-5.3||MEDIUM
EPSS-1.56% / 72.67%
||
7 Day CHG~0.00%
Published-25 Mar, 2020 | 21:12
Updated-04 Aug, 2024 | 09:11
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The first time AirPods are connected to an iPhone, they become named after the user's name by default (e.g. Jane Doe's AirPods.) Websites with camera or microphone permission are able to enumerate device names, disclosing the user's name. To resolve this issue, Firefox added a special case that renames devices containing the substring 'AirPods' to simply 'AirPods'. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxthunderbirdfirefox_esrThunderbirdFirefox ESRFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2008-5012
Matching Score-6
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-6
Assigner-Red Hat, Inc.
CVSS Score-5||MEDIUM
EPSS-2.04% / 79.16%
||
7 Day CHG~0.00%
Published-13 Nov, 2008 | 11:00
Updated-23 Apr, 2026 | 00:35
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla Firefox 2.x before 2.0.0.18, Thunderbird 2.x before 2.0.0.18, and SeaMonkey 1.x before 1.1.13 do not properly change the source URI when processing a canvas element and an HTTP redirect, which allows remote attackers to bypass the same origin policy and access arbitrary images that are not directly accessible to the attacker. NOTE: this issue can be leveraged to enumerate software on the client by performing redirections related to moz-icon.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-thunderbirdfirefoxseamonkeyn/a
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2018-18511
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-4.3||MEDIUM
EPSS-1.62% / 73.60%
||
7 Day CHG~0.00%
Published-26 Apr, 2019 | 16:13
Updated-05 Aug, 2024 | 11:08
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Cross-origin images can be read from a canvas element in violation of the same-origin policy using the transferFromImageBitmap method. *Note: This only affects Firefox 65. Previous versions are unaffected.*. This vulnerability affects Firefox < 65.0.1.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2026-16387
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.20% / 10.62%
||
7 Day CHG~0.00%
Published-21 Jul, 2026 | 12:38
Updated-24 Jul, 2026 | 15:19
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Site isolation issue in the Networking component

Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxThunderbirdFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CWE ID-CWE-284
Improper Access Control
CWE ID-CWE-346
Origin Validation Error
CVE-2026-12320
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-4.3||MEDIUM
EPSS-0.18% / 7.71%
||
7 Day CHG~0.00%
Published-16 Jun, 2026 | 11:52
Updated-16 Jun, 2026 | 17:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Information disclosure in the Password Manager component

Information disclosure in the Password Manager component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

Action-Not Available
Vendor-Mozilla Corporation
Product-ThunderbirdFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2026-12311
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-4.7||MEDIUM
EPSS-0.18% / 8.36%
||
7 Day CHG~0.00%
Published-16 Jun, 2026 | 11:52
Updated-16 Jun, 2026 | 17:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Information disclosure, sandbox escape in the Security: Process Sandboxing component

Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

Action-Not Available
Vendor-Mozilla Corporation
Product-ThunderbirdFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CWE ID-CWE-688
Function Call With Incorrect Variable or Reference as Argument
CVE-2026-0883
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-5.3||MEDIUM
EPSS-0.41% / 33.64%
||
7 Day CHG~0.00%
Published-13 Jan, 2026 | 13:30
Updated-13 Apr, 2026 | 15:17
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Information disclosure in the Networking component

Information disclosure in the Networking component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdThunderbirdFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2026-0818
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-4.3||MEDIUM
EPSS-0.16% / 5.45%
||
7 Day CHG~0.00%
Published-28 Jan, 2026 | 07:39
Updated-13 Apr, 2026 | 15:17
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
CSS-based exfiltration of the content from partially encrypted emails when allowing remote content

When a user explicitly requested Thunderbird to decrypt an inline OpenPGP message that was embedded in a text section of an email that was formatted and styled with HTML and CSS, then the decrypted contents were rendered in a context in which the CSS styles from the outer messages were active. If the user had additionally allowed loading of the remote content referenced by the outer email message, and the email was crafted by the sender using a combination of CSS rules and fonts and animations, then it was possible to extract the secret contents of the email. This vulnerability was fixed in Thunderbird 147.0.1 and Thunderbird 140.7.1.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdThunderbird
CWE ID-CWE-116
Improper Encoding or Escaping of Output
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CWE ID-CWE-352
Cross-Site Request Forgery (CSRF)
CVE-2026-0888
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-5.3||MEDIUM
EPSS-0.31% / 23.61%
||
7 Day CHG~0.00%
Published-13 Jan, 2026 | 13:30
Updated-13 Apr, 2026 | 15:17
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Information disclosure in the XML component

Information disclosure in the XML component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdThunderbirdFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2013-0792
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-4.3||MEDIUM
EPSS-1.38% / 69.28%
||
7 Day CHG~0.00%
Published-03 Apr, 2013 | 10:00
Updated-29 Apr, 2026 | 01:13
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla Firefox before 20.0 and SeaMonkey before 2.17, when gfx.color_management.enablev4 is used, do not properly handle color profiles during PNG rendering, which allows remote attackers to obtain sensitive information from process memory or cause a denial of service (memory corruption) via a grayscale PNG image.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxseamonkeyn/a
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2025-8039
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-8.1||HIGH
EPSS-0.28% / 19.90%
||
7 Day CHG~0.00%
Published-22 Jul, 2025 | 20:49
Updated-13 Apr, 2026 | 15:17
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Search terms persisted in URL bar

In some cases search terms persisted in the URL bar even after navigating away from the search page. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdThunderbirdFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2013-0786
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-5||MEDIUM
EPSS-1.66% / 74.15%
||
7 Day CHG~0.00%
Published-24 Feb, 2013 | 11:00
Updated-29 Apr, 2026 | 01:13
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The Bugzilla::Search::build_subselect function in Bugzilla 2.x and 3.x before 3.6.13 and 3.7.x and 4.0.x before 4.0.10 generates different error messages for invalid product queries depending on whether a product exists, which allows remote attackers to discover private product names by using debug mode for a query.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-bugzillan/a
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2010-3764
Matching Score-6
Assigner-MITRE Corporation
ShareView Details
Matching Score-6
Assigner-MITRE Corporation
CVSS Score-5||MEDIUM
EPSS-2.39% / 82.23%
||
7 Day CHG~0.00%
Published-05 Nov, 2010 | 16:28
Updated-29 Apr, 2026 | 01:13
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The Old Charts implementation in Bugzilla 2.12 through 3.2.8, 3.4.8, 3.6.2, 3.7.3, and 4.1 creates graph files with predictable names in graphs/, which allows remote attackers to obtain sensitive information via a modified URL.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-bugzillan/a
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2025-6425
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-4.3||MEDIUM
EPSS-0.25% / 16.09%
||
7 Day CHG-0.00%
Published-24 Jun, 2025 | 12:27
Updated-13 Apr, 2026 | 15:17
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
The WebCompat WebExtension shipped with Firefox exposed a persistent UUID

An attacker who enumerated resources from the WebCompat extension could have obtained a persistent UUID that identified the browser, and persisted between containers and normal/private browsing mode, but not profiles. This vulnerability was fixed in Firefox 140, Firefox ESR 115.25, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxThunderbirdFirefox
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2018-12372
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-6.5||MEDIUM
EPSS-2.47% / 82.82%
||
7 Day CHG~0.00%
Published-18 Oct, 2018 | 13:00
Updated-05 Aug, 2024 | 08:30
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Decrypted S/MIME parts, when included in HTML crafted for an attack, can leak plaintext when included in a a HTML reply/forward. This vulnerability affects Thunderbird < 52.9.

Action-Not Available
Vendor-Canonical Ltd.Red Hat, Inc.Mozilla CorporationDebian GNU/Linux
Product-enterprise_linux_serverubuntu_linuxthunderbirddebian_linuxenterprise_linux_workstationenterprise_linuxenterprise_linux_desktopThunderbird
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2018-12374
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-4.3||MEDIUM
EPSS-2.04% / 79.15%
||
7 Day CHG~0.00%
Published-18 Oct, 2018 | 13:00
Updated-05 Aug, 2024 | 08:30
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Plaintext of decrypted emails can leak through by user submitting an embedded form by pressing enter key within a text input field. This vulnerability affects Thunderbird < 52.9.

Action-Not Available
Vendor-Canonical Ltd.Red Hat, Inc.Mozilla CorporationDebian GNU/Linux
Product-enterprise_linux_serverubuntu_linuxthunderbirddebian_linuxenterprise_linux_workstationenterprise_linuxenterprise_linux_desktopThunderbird
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2018-12373
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-6.5||MEDIUM
EPSS-2.40% / 82.26%
||
7 Day CHG~0.00%
Published-18 Oct, 2018 | 13:00
Updated-05 Aug, 2024 | 08:31
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

dDecrypted S/MIME parts hidden with CSS or the plaintext HTML tag can leak plaintext when included in a HTML reply/forward. This vulnerability affects Thunderbird < 52.9.

Action-Not Available
Vendor-Canonical Ltd.Red Hat, Inc.Mozilla CorporationDebian GNU/Linux
Product-enterprise_linux_serverubuntu_linuxthunderbirddebian_linuxenterprise_linux_workstationenterprise_linuxenterprise_linux_desktopThunderbird
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2018-12397
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-7.1||HIGH
EPSS-0.37% / 29.43%
||
7 Day CHG~0.00%
Published-28 Feb, 2019 | 18:00
Updated-25 Nov, 2025 | 17:50
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A WebExtension can request access to local files without the warning prompt stating that the extension will "Access your data for all websites" being displayed to the user. This allows extensions to run content scripts in local pages without permission warnings when a local file is opened. This vulnerability affects Firefox ESR < 60.3 and Firefox < 63.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.Debian GNU/LinuxRed Hat, Inc.
Product-firefoxubuntu_linuxenterprise_linux_desktopenterprise_linux_serverenterprise_linux_server_eusdebian_linuxenterprise_linux_workstationFirefoxFirefox ESR
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2022-31746
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-6.5||MEDIUM
EPSS-0.41% / 33.81%
||
7 Day CHG~0.00%
Published-22 Dec, 2022 | 00:00
Updated-15 Apr, 2025 | 19:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Internal URLs are protected by a secret UUID key, which could have been leaked to web page through the Referrer header. This vulnerability affects Firefox for iOS < 102.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox for iOS
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2012-5884
Matching Score-6
Assigner-MITRE Corporation
ShareView Details
Matching Score-6
Assigner-MITRE Corporation
CVSS Score-5||MEDIUM
EPSS-1.17% / 64.02%
||
7 Day CHG~0.00%
Published-16 Nov, 2012 | 11:00
Updated-29 Apr, 2026 | 01:13
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The User.get method in Bugzilla/WebService/User.pm in Bugzilla 4.3.2 allows remote attackers to obtain sensitive information about the saved searches of arbitrary users via an XMLRPC request or a JSONRPC request, a different vulnerability than CVE-2012-4198.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-bugzillan/a
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
CVE-2022-22745
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-6.5||MEDIUM
EPSS-0.65% / 47.23%
||
7 Day CHG~0.00%
Published-22 Dec, 2022 | 00:00
Updated-16 Apr, 2025 | 15:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Securitypolicyviolation events could have leaked cross-origin information for frame-ancestors violations. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefox_esrfirefoxFirefox ESRFirefoxThunderbird
CWE ID-CWE-200
Exposure of Sensitive Information to an Unauthorized Actor
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