Logo
-

Byte Open Security

(ByteOS Network)

Log In

Sign Up

ByteOS

Security
Vulnerability Details
Registries
Custom Views
Weaknesses
Attack Patterns
Filters & Tools
Vulnerability Details :

CVE-2026-35544

Summary
Assigner-mitre
Assigner Org ID-8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At-03 Apr, 2026 | 03:59
Updated At-03 Apr, 2026 | 12:50
Rejected At-
Credits

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to a fixed-position mitigation bypass via the use of !important.

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:mitre
Assigner Org ID:8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At:03 Apr, 2026 | 03:59
Updated At:03 Apr, 2026 | 12:50
Rejected At:
â–¼CVE Numbering Authority (CNA)

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to a fixed-position mitigation bypass via the use of !important.

Affected Products
Vendor
Roundcube Webmail ProjectRoundcube
Product
Webmail
Default Status
unaffected
Versions
Affected
  • From 0 before 1.5.14 (semver)
  • From 1.6.0 before 1.6.14 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-669CWE-669 Incorrect Resource Transfer Between Spheres
Type: CWE
CWE ID: CWE-669
Description: CWE-669 Incorrect Resource Transfer Between Spheres
Metrics
VersionBase scoreBase severityVector
3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14
N/A
https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5
N/A
https://github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0
N/A
https://github.com/roundcube/roundcubemail/releases/tag/1.6.14
N/A
https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662
N/A
https://github.com/roundcube/roundcubemail/releases/tag/1.5.14
N/A
https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7
N/A
Hyperlink: https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14
Resource: N/A
Hyperlink: https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5
Resource: N/A
Hyperlink: https://github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0
Resource: N/A
Hyperlink: https://github.com/roundcube/roundcubemail/releases/tag/1.6.14
Resource: N/A
Hyperlink: https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662
Resource: N/A
Hyperlink: https://github.com/roundcube/roundcubemail/releases/tag/1.5.14
Resource: N/A
Hyperlink: https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7
Resource: N/A
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
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:cve@mitre.org
Published At:03 Apr, 2026 | 05:16
Updated At:09 Apr, 2026 | 01:09

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to a fixed-position mitigation bypass via the use of !important.

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
Secondary3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CPE Matches
Roundcube Webmail Project
roundcube
>>webmail>>Versions up to 1.5.13(inclusive)
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
Roundcube Webmail Project
roundcube
>>webmail>>Versions from 1.6.0(inclusive) to 1.6.13(inclusive)
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-669Primarycve@mitre.org
CWE ID: CWE-669
Type: Primary
Source: cve@mitre.org
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662cve@mitre.org
Patch
https://github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0cve@mitre.org
Patch
https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7cve@mitre.org
Patch
https://github.com/roundcube/roundcubemail/releases/tag/1.5.14cve@mitre.org
Release Notes
https://github.com/roundcube/roundcubemail/releases/tag/1.6.14cve@mitre.org
Release Notes
https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5cve@mitre.org
Release Notes
https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14cve@mitre.org
Vendor Advisory
Hyperlink: https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662
Source: cve@mitre.org
Resource:
Patch
Hyperlink: https://github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0
Source: cve@mitre.org
Resource:
Patch
Hyperlink: https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7
Source: cve@mitre.org
Resource:
Patch
Hyperlink: https://github.com/roundcube/roundcubemail/releases/tag/1.5.14
Source: cve@mitre.org
Resource:
Release Notes
Hyperlink: https://github.com/roundcube/roundcubemail/releases/tag/1.6.14
Source: cve@mitre.org
Resource:
Release Notes
Hyperlink: https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5
Source: cve@mitre.org
Resource:
Release Notes
Hyperlink: https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14
Source: cve@mitre.org
Resource:
Vendor Advisory

Change History

0
Information is not available yet

Similar CVEs

5Records found
CVE-2026-35545
Matching Score-10
Assigner-MITRE Corporation
ShareView Details
Matching Score-10
Assigner-MITRE Corporation
CVSS Score-5.3||MEDIUM
EPSS-0.04% / 13.44%
||
7 Day CHG~0.00%
Published-03 Apr, 2026 | 04:02
Updated-07 Apr, 2026 | 20:37
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

An issue was discovered in Roundcube Webmail before 1.5.15 and 1.6.15. The remote image blocking feature can be bypassed via SVG content in an e-mail message. This may lead to information disclosure or access-control bypass. This involves the animate element with attributeName=fill/filter/stroke.

Action-Not Available
Vendor-Roundcube Webmail Project
Product-webmailWebmail
CWE ID-CWE-669
Incorrect Resource Transfer Between Spheres
CVE-2026-35542
Matching Score-6
Assigner-MITRE Corporation
ShareView Details
Matching Score-6
Assigner-MITRE Corporation
CVSS Score-5.3||MEDIUM
EPSS-0.04% / 13.03%
||
7 Day CHG~0.00%
Published-03 Apr, 2026 | 03:54
Updated-07 Apr, 2026 | 20:41
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking feature can be bypassed via a crafted background attribute of a BODY element in an e-mail message. This may lead to information disclosure or access-control bypass.

Action-Not Available
Vendor-Roundcube Webmail Project
Product-webmailWebmail
CWE ID-CWE-669
Incorrect Resource Transfer Between Spheres
CVE-2026-35543
Matching Score-6
Assigner-MITRE Corporation
ShareView Details
Matching Score-6
Assigner-MITRE Corporation
CVSS Score-5.3||MEDIUM
EPSS-0.04% / 13.03%
||
7 Day CHG~0.00%
Published-03 Apr, 2026 | 03:57
Updated-07 Apr, 2026 | 20:40
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking feature can be bypassed via SVG content (with animate attributes) in an e-mail message. This may lead to information disclosure or access-control bypass.

Action-Not Available
Vendor-Roundcube Webmail Project
Product-webmailWebmail
CWE ID-CWE-669
Incorrect Resource Transfer Between Spheres
CVE-2026-35540
Matching Score-6
Assigner-MITRE Corporation
ShareView Details
Matching Score-6
Assigner-MITRE Corporation
CVSS Score-5.4||MEDIUM
EPSS-0.05% / 14.43%
||
7 Day CHG~0.00%
Published-03 Apr, 2026 | 03:47
Updated-07 Apr, 2026 | 20:52
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

An issue was discovered in Roundcube Webmail 1.6.0 before 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts.

Action-Not Available
Vendor-Roundcube Webmail Project
Product-webmailWebmail
CWE ID-CWE-669
Incorrect Resource Transfer Between Spheres
CVE-2022-35916
Matching Score-4
Assigner-GitHub, Inc.
ShareView Details
Matching Score-4
Assigner-GitHub, Inc.
CVSS Score-5.3||MEDIUM
EPSS-0.24% / 47.66%
||
7 Day CHG~0.00%
Published-01 Aug, 2022 | 21:00
Updated-23 Apr, 2025 | 17:54
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Cross chain utilities for Arbitrum L2 see EOA calls as cross chain calls

OpenZeppelin Contracts is a library for secure smart contract development. Contracts using the cross chain utilities for Arbitrum L2, `CrossChainEnabledArbitrumL2` or `LibArbitrumL2`, will classify direct interactions of externally owned accounts (EOAs) as cross chain calls, even though they are not started on L1. This issue has been patched in v4.7.2. Users are advised to upgrade. There are no known workarounds for this issue.

Action-Not Available
Vendor-openzeppelinOpenZeppelin
Product-contractscontracts_upgradeableopenzeppelin-contracts
CWE ID-CWE-669
Incorrect Resource Transfer Between Spheres
Details not found