Inclusion of Functionality from Untrusted Control Sphere Affecting roundcube package, versions <1.6.13+dfsg-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-ROUNDCUBE-15265473
- published11 Feb 2026
- disclosed11 Feb 2026
Introduced: 11 Feb 2026
NewCVE-2026-26079 (opens in a new tab)How to fix?
Upgrade Debian:unstable roundcube to version 1.6.13+dfsg-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream roundcube package and not the roundcube package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13 allows Cascading Style Sheets (CSS) injection, e.g., because comments are mishandled.
References
- https://security-tracker.debian.org/tracker/CVE-2026-26079
- https://github.com/roundcube/roundcubemail/commit/1f4c3a5af5033747f9685a8a395dbd8228d19816
- https://github.com/roundcube/roundcubemail/commit/2b5625f1d2ef7e050fd1ae481b2a52dc35466447
- https://github.com/roundcube/roundcubemail/commit/53d75d5dfebef235a344d476b900c20c12d52b01
- https://github.com/roundcube/roundcubemail/commit/5a3315cce587e0be58335d11ff9a5571c90494a5
- https://github.com/roundcube/roundcubemail/commit/bf89cbaa5897d8ad62e8057d9a3f6babb90b7954
- https://github.com/roundcube/roundcubemail/commit/c15f5dbf093a497e19a749b20e7f8fb5a9c24cde
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.13
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.13
- https://roundcube.net/news/2026/02/08/security-updates-1.6.13-and-1.5.13