High severity7.1NVD Advisory· Published Oct 22, 2026
CVE-2026-114720
CVE-2026-114720
Description
Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an IMAP command injection vulnerability. A remote authenticated attacker can exploit this via CRLF sequences injected into the _flag parameter of the mail/mark action to execute arbitrary IMAP commands. Upstream fixed this in the commit “Fix IMAP command injection via CRLF in _flag parameter of mail/mark action”, which rejects flags containing control, whitespace and IMAP-special characters.
Affected products
1- Range: <1.6.20, <1.7.5
Patches
Vulnerability mechanics
References
6- bugs.debian.org/1151279nvd
- github.com/roundcube/roundcubemail/commit/242c6d6a150c850bd96d20d400261e71f8d11f9bnvd
- github.com/roundcube/roundcubemail/commit/6c3c1897c11e193e47fccaabc87e9ca2a0a73e51nvd
- github.com/roundcube/roundcubemail/releases/tag/1.6.20nvd
- github.com/roundcube/roundcubemail/releases/tag/1.7.5nvd
- roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5nvd
News mentions
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