CVE-2026-114717CWE-99

CVE-2026-114717

Medium · published October 22, 2026

CVSS v3.1
4.0
EPSS
0%
Percentile
21.4
In the wild
Unconfirmed
What it is

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability when a message is forwarded as an attachment. The subject of the forwarded message was used verbatim to generate the attachment name, so a received message whose subject contains CRLF sequences could inject arbitrary MIME part headers into the outgoing message. Upstream fixed this in the commit “Fix mail header injection via subject of a message forwarded as attachment”, which collapses whitespace in the generated name.

The record
Technical detail
CVSS v3.1
4.0 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00298 · 21.4th percentile
Weakness
CWE-99 · Improper Control of Resource Identifiers ('Resource Injection')
Published
2026-10-22T06:16Z
References (6)
https://bugs.debian.org/1151279 · [email protected]https://github.com/roundcube/roundcubemail/commit/4c3291ce9df9e1d3b45330d0854d65cd8efbeee9 · [email protected]https://github.com/roundcube/roundcubemail/commit/c325953a251d0132f1909569b3eac0b974095dd4 · [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
  • 23 OCT 03:55Z
    EPSS moved — → 0%
    epss
  • 22 OCT 01:21Z
    Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability when a message is forwarded as an attachment
    cvelistv5
  • 22 OCT 01:21Z
    Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a mail header injection vulnerability when a message is forwarded as an attachment
    cvelistv5