CVE-2026-113386CWE-93

CVE-2026-113386

High · published October 20, 2026

CVSS v3.1
7.1
EPSS
1%
Percentile
61.6
In the wild
Unconfirmed
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.

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00972 · 61.6th percentile
Weakness
CWE-93 · Improper Neutralization of CRLF Sequences ('CRLF Injection')
Published
2026-10-20T09:16Z
References (7)
https://bugs.debian.org/1151279 · [email protected]https://github.com/roundcube/roundcubemail/commit/004adaaeca4f6799715a54d12e3f657f19efcc9a · [email protected]https://github.com/roundcube/roundcubemail/commit/bf5bc0266a8cd16be6b640409e64a6c6c2705049 · [email protected]https://github.com/roundcube/roundcubemail/commit/f62879defc0330ae240c72b83b2d00a8ab337447 · [email protected]https://github.com/roundcube/roundcubemail/releases/tag/1.6.20 · [email protected]https://github.com/roundcube/roundcubemail/releases/tag/1.7.5 · [email protected]https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5 · [email protected]
EPSS history
Timeline
  • 21 OCT 03:27Z
    EPSS moved — → 1%
    epss
  • 20 OCT 04:53Z
    Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 are affected by IMAP command injection
    cvelistv5
  • 20 OCT 04:53Z
    Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 are affected by IMAP command injection
    cvelistv5