CVE-2026-114724
highRoundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 contains an object injection primitive in rcube_session::unserialize().
Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 contains an object injection primitive in rcube_session::unserialize(). A session key prefixed with “!” was treated as having no value, and the reconstructed serialized string was emitted with a key but no corresponding value, desynchronizing the remainder of the input so that following session data was interpreted as a serialized value. This yields a PHP object injection primitive for an attacker able to influence stored session data. Upstream fixed this in the commit “Fix object injection primitive in rcube_session::unserialize() via “!”-prefixed session keys”, which rejects such keys.
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://bugs.debian.org/1151279 cve@mitre.org
- https://github.com/roundcube/roundcubemail/commit/833770d3d3c35cfde74cc2614d368f25a75b6f99 cve@mitre.org
- https://github.com/roundcube/roundcubemail/commit/93284f3f0e13f99af37fc3b81861e142eea8a922 cve@mitre.org
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.20 cve@mitre.org
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.5 cve@mitre.org
- https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5 cve@mitre.org