Vulnerability Description
In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the "Add to address book" action was subject to stored XSS.
CVSS Score
5.4
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Roundcube | Webmail | >= 1.6.0, < 1.6.18 |
Related Weaknesses (CWE)
References
- https://github.com/roundcube/roundcubemail/commit/2d2a9604a820ee279c9ffcfe856b9bPatch
- https://github.com/roundcube/roundcubemail/commit/32f20c6bfd12dff9cfb6880ae303e7Patch
- 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-2026-74999?
CVE-2026-74999 is a vulnerability with a CVSS score of 5.4 (MEDIUM). In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the "Add to address book" action was subject to stored XSS.
How severe is CVE-2026-74999?
CVE-2026-74999 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-74999?
Check the references section above for vendor advisories and patch information. Affected products include: Roundcube Webmail.