CVE-2026-113386
Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 are affected by IMAP command injection
- Risk score
- 55/100
- CVSS
- 7.1 v3.1
- Exploit chance (30 days)
- 1.0%
- Published
- 20 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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.
- Affected
- See advisory
- Fix
- Upgrade the product to 1.6.20, 1.7 or 1.7.5 (whichever matches your release line), or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 7.1 high
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
Original 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.
Last activity 20 Oct 2026. Patch Forecast updates every hour.