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Vulnerability Details :

CVE-2026-2760

Summary
Assigner-mozilla
Assigner Org ID-f16b083a-5664-49f3-a51e-8d479e5ed7fe
Published At-24 Feb, 2026 | 13:33
Updated At-26 Feb, 2026 | 15:51
Rejected At-
Credits

Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component

Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

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)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:mozilla
Assigner Org ID:f16b083a-5664-49f3-a51e-8d479e5ed7fe
Published At:24 Feb, 2026 | 13:33
Updated At:26 Feb, 2026 | 15:51
Rejected At:
â–¼CVE Numbering Authority (CNA)
Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component

Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

Affected Products
Vendor
Mozilla CorporationMozilla
Product
Firefox
Versions
Affected
  • From unspecified before 148 (custom)
Vendor
Mozilla CorporationMozilla
Product
Firefox ESR
Versions
Affected
  • From unspecified before 115.33 (custom)
Vendor
Mozilla CorporationMozilla
Product
Firefox ESR
Versions
Affected
  • From unspecified before 140.8 (custom)
Vendor
Mozilla CorporationMozilla
Product
Thunderbird
Versions
Affected
  • From unspecified before 148 (custom)
Vendor
Mozilla CorporationMozilla
Product
Thunderbird
Versions
Affected
  • From unspecified before 140.8 (custom)
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Oskar L
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://bugzilla.mozilla.org/show_bug.cgi?id=2011062
N/A
https://www.mozilla.org/security/advisories/mfsa2026-13/
N/A
https://www.mozilla.org/security/advisories/mfsa2026-14/
N/A
https://www.mozilla.org/security/advisories/mfsa2026-15/
N/A
https://www.mozilla.org/security/advisories/mfsa2026-16/
N/A
https://www.mozilla.org/security/advisories/mfsa2026-17/
N/A
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=2011062
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-13/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-14/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-15/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-16/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-17/
Resource: N/A
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-1384CWE-1384 Improper Handling of Physical or Environmental Conditions
Type: CWE
CWE ID: CWE-1384
Description: CWE-1384 Improper Handling of Physical or Environmental Conditions
Metrics
VersionBase scoreBase severityVector
3.110.0CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Version: 3.1
Base score: 10.0
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@mozilla.org
Published At:24 Feb, 2026 | 14:16
Updated At:26 Feb, 2026 | 16:24

Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

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
Primary3.110.0CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Secondary3.110.0CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Type: Primary
Version: 3.1
Base score: 10.0
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Type: Secondary
Version: 3.1
Base score: 10.0
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CPE Matches
Mozilla Corporation
mozilla
>>firefox>>Versions before 115.33.0(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
Mozilla Corporation
mozilla
>>firefox>>Versions before 148.0(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
Mozilla Corporation
mozilla
>>firefox>>Versions from 128.0(inclusive) to 140.8.0(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
Mozilla Corporation
mozilla
>>thunderbird>>Versions before 140.8.0(exclusive)
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
Mozilla Corporation
mozilla
>>thunderbird>>Versions before 148.0(exclusive)
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
Weaknesses
CWE IDTypeSource
NVD-CWE-noinfoPrimarynvd@nist.gov
CWE-1384Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: NVD-CWE-noinfo
Type: Primary
Source: nvd@nist.gov
CWE ID: CWE-1384
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=2011062security@mozilla.org
Issue Tracking
Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-13/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-14/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-15/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-16/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-17/security@mozilla.org
Vendor Advisory
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=2011062
Source: security@mozilla.org
Resource:
Issue Tracking
Permissions Required
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-13/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-14/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-15/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-16/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-17/
Source: security@mozilla.org
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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||
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Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
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||
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Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
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Incorrect boundary conditions in the WebRTC: Audio/Video component

Incorrect boundary conditions in the WebRTC: Audio/Video component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

Action-Not Available
Vendor-Mozilla Corporation
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CWE ID-CWE-1384
Improper Handling of Physical or Environmental Conditions
Details not found