GitHub Advisoryadvisory · Packagist
GHSA-x4q5-8j5g-hpjc Roundcube Webmail: Insufficient HTML attachment sanitization in preview mode
MEDIUM
Official page ↗
- Aliases
- CVE-2026-35539
- Ecosystem
- Packagist
- Packages
- roundcube/roundcubemail
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-79
- Reviewed
- 2026-04-04
Affected packages
• Packagist roundcube/roundcubemail: >= 1.7-beta, < 1.7-rc5 → fixed in 1.7-rc5
Description
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. XSS exists because of insufficient HTML attachment sanitization in preview mode. A victim must preview a text/html attachment.
Related
Alias · CVE (1)
- CVE-2026-35539 An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. vulnerability
Weakness · CWE (1)
- CWE-79 Improper Neutralization of Input During Web Page Generation weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-35539 advisory
- https://github.com/roundcube/roundcubemail/commit/10a6d1fa8acac85c727b0a6ae4a6642bfa27bea1 web
- https://github.com/roundcube/roundcubemail/commit/1b30edf5369668c92fe91dae3d52e477c808aa4f web
- https://github.com/roundcube/roundcubemail/commit/d742954ccbcdee7020f8f2e7c49ce0fca5a0efab web
- https://github.com/roundcube/roundcubemail package
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 web
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 web
- https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 web
- https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 web