Vulnerability Details CVE-2026-114720
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.008
EPSS Ranking 56.4%
CVSS Severity
CVSS v3 Score 7.1
References
- https://bugs.debian.org/1151279
- https://github.com/roundcube/roundcubemail/commit/242c6d6a150c850bd96d20d400261e71f8d11f9b
- https://github.com/roundcube/roundcubemail/commit/6c3c1897c11e193e47fccaabc87e9ca2a0a73e51
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.20
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.5
- https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5
Products affected by CVE-2026-114720
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cpe:2.3:a:roundcube:webmail:1.6.0
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cpe:2.3:a:roundcube:webmail:1.6.1
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cpe:2.3:a:roundcube:webmail:1.6.10
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cpe:2.3:a:roundcube:webmail:1.6.11
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cpe:2.3:a:roundcube:webmail:1.6.12
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cpe:2.3:a:roundcube:webmail:1.6.13
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cpe:2.3:a:roundcube:webmail:1.6.14
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cpe:2.3:a:roundcube:webmail:1.6.15
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cpe:2.3:a:roundcube:webmail:1.6.16
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cpe:2.3:a:roundcube:webmail:1.6.17
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cpe:2.3:a:roundcube:webmail:1.6.18
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cpe:2.3:a:roundcube:webmail:1.6.19
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cpe:2.3:a:roundcube:webmail:1.6.2
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cpe:2.3:a:roundcube:webmail:1.6.3
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cpe:2.3:a:roundcube:webmail:1.6.4
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cpe:2.3:a:roundcube:webmail:1.6.5
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cpe:2.3:a:roundcube:webmail:1.6.6
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cpe:2.3:a:roundcube:webmail:1.6.7
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cpe:2.3:a:roundcube:webmail:1.6.8
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cpe:2.3:a:roundcube:webmail:1.6.9
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cpe:2.3:a:roundcube:webmail:1.7.0
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cpe:2.3:a:roundcube:webmail:1.7.1
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cpe:2.3:a:roundcube:webmail:1.7.2
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cpe:2.3:a:roundcube:webmail:1.7.3
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cpe:2.3:a:roundcube:webmail:1.7.4