| Name | CVE-2026-74998 |
| Description | In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS (Cascading Style Sheets) proxy were not validated, which may result in information disclosure or XSS (cross-site scripting) via MIME sniffing. |
| 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) |
| Debian Bugs | 1144059 |
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+deb11u10 | vulnerable | |
| bookworm | 1.6.5+dfsg-1+deb12u9 | vulnerable | |
| bookworm (security) | 1.6.5+dfsg-1+deb12u10 | vulnerable | |
| trixie | 1.6.16+dfsg-0+deb13u1 | vulnerable | |
| trixie (security) | 1.6.17+dfsg-0+deb13u1 | vulnerable | |
| forky, sid | 1.6.18+dfsg-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| roundcube | source | (unstable) | 1.6.18+dfsg-1 | 1144059 |
Fixed by: https://github.com/roundcube/roundcubemail/commit/62d33c8a0dc3fd0dd03984220dc9709e8e0de43b (1.6.18)