High severity8.8NVD Advisory· Published Aug 17, 2026· Updated Aug 17, 2026
CVE-2026-74997
CVE-2026-74997
Description
In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the cmd_learn driver of the markasjunk plugin is subject to remote code execution via crafted placeholder replacement values. This issue only affects Roundcube instances using the markasjunk plugin with its cmd_learn driver.
Affected products
1- Range: <1.6.18, <1.7.3
Patches
Vulnerability mechanics
References
6- github.com/roundcube/roundcubemail/commit/14044f843cfacbe78b042f659e379d6b4497aa7cnvd
- github.com/roundcube/roundcubemail/commit/495d211638f222336b20f4744545c53712426c2anvd
- github.com/roundcube/roundcubemail/commit/b8f90e28a46d42e79a69568cba897f8f4223d9cdnvd
- github.com/roundcube/roundcubemail/releases/tag/1.6.18nvd
- github.com/roundcube/roundcubemail/releases/tag/1.7.3nvd
- roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3nvd
News mentions
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