CVE-2026-74997CWE-78command-injection

CVE-2026-74997

High · published August 17, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
66.2
In the wild
Unconfirmed
What it is

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the cmd_learn driver of the markasjunk plugin is subject to remote code execution via crafted placeholder replacement values. This issue only affects Roundcube instances using the markasjunk plugin with its cmd_learn driver.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01134 · 66.2th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-08-17T17:16Z
Affected products (2)
ProductVersionsFixed in
roundcube/webmail≥ 1.6.0, < 1.6.181.6.18
roundcube/webmail≥ 1.7.0, < 1.7.31.7.3
References (6)
https://github.com/roundcube/roundcubemail/commit/14044f843cfacbe78b042f659e379d6b4497aa7c · [email protected]https://github.com/roundcube/roundcubemail/commit/495d211638f222336b20f4744545c53712426c2a · [email protected]https://github.com/roundcube/roundcubemail/commit/b8f90e28a46d42e79a69568cba897f8f4223d9cd · [email protected]https://github.com/roundcube/roundcubemail/releases/tag/1.6.18 · [email protected]https://github.com/roundcube/roundcubemail/releases/tag/1.7.3 · [email protected]https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3 · [email protected]
EPSS history
Timeline
  • 17 AUG 12:37Z
    In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the cmd_learn driver of the markasjunk plugin is subject to remote code execution via crafted…
    cvelistv5