roundcube/roundcubemail · Security
Roundcube Webmail: Insufficient HTML attachment sanitization in preview mode
- GHSA ID
- GHSA-x4q5-8j5g-hpjc
- CVE ID
- CVE-2026-35539
- Severity
- medium
- Published
- Updated
- CVSS
- 6.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- CVSS v3
- 6.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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.
CWEs
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-35539 ↗
- https://github.com/roundcube/roundcubemail/commit/10a6d1fa8acac85c727b0a6ae4a6642bfa27bea1 ↗
- https://github.com/roundcube/roundcubemail/commit/1b30edf5369668c92fe91dae3d52e477c808aa4f ↗
- https://github.com/roundcube/roundcubemail/commit/d742954ccbcdee7020f8f2e7c49ce0fca5a0efab ↗
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 ↗
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 ↗
- https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 ↗
- https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 ↗
- https://github.com/advisories/GHSA-x4q5-8j5g-hpjc ↗