CVE-2026-114720: high-severity vulnerability in Roundcube Webmail
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.8%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Affected products
Roundcube · WebmailRelated CVEs — Roundcube Webmail
In the same product, most dangerous first.
References
https://bugs.debian.org/1151279https://github.com/roundcube/roundcubemail/commit/242c6d6a150c850bd96d20d400261e71f8d11f9bhttps://github.com/roundcube/roundcubemail/commit/6c3c1897c11e193e47fccaabc87e9ca2a0a73e51https://github.com/roundcube/roundcubemail/releases/tag/1.6.20https://github.com/roundcube/roundcubemail/releases/tag/1.7.5https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5