CVE-2026-35543
roundcubeVulnerabilityCVSS 5.3Patched
No public exploitation has been reported so far. A fixed version is available (see the table below).
Recommended action: Update to the fixed version listed for your distribution using the native package manager.
Severity metrics
CVSS 3.1 : 5.3 MEDIUM
Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
Confidentiality impactLow
Integrity impactNone
Availability impactNone
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Affected & fixed versions by distribution
Versions are the native distribution strings (backport-aware): RHEL/Debian/SUSE backport fixes, so compare with the distro version comparator (dpkg / rpm / vercmp), not the upstream version.
| Distribution | Package | Affected | Fixed version | Status |
|---|---|---|---|---|
| Debian:11 | roundcube | - | 1.4.15+dfsg.1-1+deb11u8 | fixed |
| Debian:12 | roundcube | - | 1.6.5+dfsg-1+deb12u8 | fixed |
| Debian:13 | roundcube | - | 1.6.15+dfsg-0+deb13u1 | fixed |
| Debian:14 | roundcube | - | 1.6.14+dfsg-1 | fixed |
| Ubuntu:Pro:16.04:LTS | roundcube | - | - | affected (no fix yet) |
| Ubuntu:Pro:18.04:LTS | roundcube | - | - | affected (no fix yet) |
| Ubuntu:Pro:20.04:LTS | roundcube | - | - | affected (no fix yet) |
| Ubuntu:Pro:22.04:LTS | roundcube | - | - | affected (no fix yet) |
| Ubuntu:Pro:24.04:LTS | roundcube | - | - | affected (no fix yet) |
| Ubuntu:25.10 | roundcube | - | - | affected (no fix yet) |
| Ubuntu:Pro:26.04:LTS | roundcube | - | - | affected (no fix yet) |