In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, 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. NOTE: this issue exists because of insufficient fixes for CVE-2026-35540 and CVE-2026-48843.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/roundcube/roundcubemail/commit/294c7da6e7284166f040cef8607b677d459e0786 Patch
- https://github.com/roundcube/roundcubemail/commit/6d69e094d55d3a9a84dfb36edf6ca985311f0c1c Patch
- https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2 Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 10.0 · roundcubeNVD modified 2026-10-24 21:10
Affected (CPE criteria) 1
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
References 5
- https://github.com/roundcube/roundcubemail/commit/294c7da6e7284166f040cef8607b677d459e0786 Patch
- https://github.com/roundcube/roundcubemail/commit/6d69e094d55d3a9a84dfb36edf6ca985311f0c1c Patch
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.17 Release Notes
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.2 Release Notes
- https://roundcube.net/news/2026/07/05/security-updates-1.6.17-and-1.7.2 Vendor Advisory