Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Roundcube | Webmail | >= 1.6.0, < 1.6.18 |
Related Weaknesses (CWE)
References
- https://github.com/roundcube/roundcubemail/commit/14044f843cfacbe78b042f659e379dPatch
- https://github.com/roundcube/roundcubemail/commit/495d211638f222336b20f4744545c5Patch
- https://github.com/roundcube/roundcubemail/commit/b8f90e28a46d42e79a69568cba897fPatch
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.18Release Notes
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.3Release Notes
- https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3Vendor Advisory
FAQ
What is CVE-2026-74997?
CVE-2026-74997 is a vulnerability with a CVSS score of 8.8 (HIGH). 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...
How severe is CVE-2026-74997?
CVE-2026-74997 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-74997?
Check the references section above for vendor advisories and patch information. Affected products include: Roundcube Webmail.