CVE-2026-113386

Name	CVE-2026-113386
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-6579-1
Debian Bugs	1151279

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
roundcube (PTS)	bookworm	1.6.5+dfsg-1+deb12u9	vulnerable
	bookworm (security)	1.6.5+dfsg-1+deb12u12	vulnerable
	trixie	1.6.18+dfsg-0+deb13u1	vulnerable
	trixie (security)	1.6.20+dfsg-0+deb13u1	fixed
	forky, sid	1.6.20+dfsg-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
roundcube	source	trixie	1.6.20+dfsg-0+deb13u1		DSA-6579-1
roundcube	source	(unstable)	1.6.20+dfsg-1			1151279

Notes

https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5
Fixed by: https://github.com/roundcube/roundcubemail/commit/f62879defc0330ae240c72b83b2d00a8ab337447 (1.6.20)