| Name | CVE-2026-26079 |
| Description | 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4480-1, DSA-6137-1 |
| Debian Bugs | 1127447 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| roundcube (PTS) | bullseye | 1.4.15+dfsg.1-1+deb11u4 | vulnerable |
| bullseye (security) | 1.4.15+dfsg.1-1+deb11u7 | fixed |
| bookworm | 1.6.5+dfsg-1+deb12u6 | vulnerable |
| bookworm (security) | 1.6.5+dfsg-1+deb12u7 | fixed |
| trixie | 1.6.12+dfsg-0+deb13u1 | vulnerable |
| trixie (security) | 1.6.13+dfsg-0+deb13u1 | fixed |
| forky, sid | 1.6.13+dfsg-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
Fixed by: https://github.com/roundcube/roundcubemail/commit/1f4c3a5af5033747f9685a8a395dbd8228d19816 (1.6.13)
Regression fix: https://github.com/roundcube/roundcubemail/commit/2b5625f1d2ef7e050fd1ae481b2a52dc35466447 (1.6.13)
Regression fix: https://github.com/roundcube/roundcubemail/commit/53d75d5dfebef235a344d476b900c20c12d52b01 (1.6.13)
https://roundcube.net/news/2026/02/08/security-updates-1.6.13-and-1.5.13