CVE-2026-113386

EUVD-2026-104794
Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 are affected by IMAP command injection. A remote authenticated attacker can exploit this via CRLF sequences injected into the _uid parameter of the mail/headers and mail/viewsource actions to execute arbitrary IMAP commands.
CRLF Injection
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mitreCNA
7.1 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 61.57%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
roundcubewebmail
1.6.0 ≤
𝑥
< 1.6.20
CNA
roundcubewebmail
1.7.0 ≤
𝑥
< 1.7.5
CNA
Debian logo
Debian Releases
Debian Product
Codename
roundcube
bookworm
vulnerable
bookworm (security)
vulnerable
forky
vulnerable
sid
1.6.20+dfsg-1
fixed
trixie
vulnerable
trixie (security)
vulnerable
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://bugs.debian.org/1151279
https://github.com/roundcube/roundcubemail/commit/004adaaeca4f6799715a54d12e3f657f19efcc9a
https://github.com/roundcube/roundcubemail/commit/bf5bc0266a8cd16be6b640409e64a6c6c2705049
https://github.com/roundcube/roundcubemail/commit/f62879defc0330ae240c72b83b2d00a8ab337447
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