MSRXCVE-2026-114724
CVE-2026-114724
CVSS 3.1 · CNA
chance of exploitation in the next 30 days (EPSS; higher than 17% of CVEs)
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.
Scores
Affected products
- Roundcube Webmail: 1.6.0 to < 1.6.20; 1.7.0 to < 1.7.5
Weakness: CWE-502
6 references (advisories, patches, write-ups)
- https://bugs.debian.org/1151279 · issue-tracking, third-party-advisory
- https://github.com/roundcube/roundcubemail/commit/93284f3f0e13f99af37fc3b81861e142eea8a922 · patch
- https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5 · vendor-advisory, release-notes
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.5 · release-notes, patch
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.20 · release-notes, patch
- https://github.com/roundcube/roundcubemail/commit/833770d3d3c35cfde74cc2614d368f25a75b6f99 · patch
Sources: CVE.org, OSV.dev, FIRST EPSS. Missing ones did not answer or have no record yet.