CVE-2026-35540

Published: Apr 3, 2026Modified: Jul 24, 2026

6.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploitability: 3.9 / Impact: 2.5

Source: NVD

Description

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.

Affected (1)

Products: Roundcube: Webmail

Roundcube

1 product

Webmail

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Roundcube Webmail	From 1.6.0 to 1.6.14

Related CWEs

CWE-669

Incorrect Resource Transfer Between Spheres

The product does not properly transfer a resource/behavior to another sphere, or improperly imports a resource/behavior from another sphere, in a manner that provides unintended control over that resource.

References (5)

https://github.com/roundcube/roundcubemail/commit/27ec6cc9cb25e1ef8b4d4ef39ce76d619caa6870

Source: cve@mitre.org

Patch

https://github.com/roundcube/roundcubemail/commit/579b68eff90650a5c782e153debd66c765648942

Source: cve@mitre.org

Patch

https://github.com/roundcube/roundcubemail/releases/tag/1.6.14

Source: cve@mitre.org

Release Notes

https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5

Source: cve@mitre.org

Release Notes

https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14

Source: cve@mitre.org

Vendor Advisory

Timeline

No history available yet.