CVE-2026-74999

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.

Affected Platforms

Weakness Type

CWE-79

References

• https://github.com/roundcube/roundcubemail/commit/2d2a9604a820ee279c9ffcfe856b9b…
• https://github.com/roundcube/roundcubemail/commit/32f20c6bfd12dff9cfb6880ae303e7…
• https://github.com/roundcube/roundcubemail/releases/tag/1.6.18
• https://github.com/roundcube/roundcubemail/releases/tag/1.7.3
• https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3