CVE-2026-74997

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/roundcube/roundcubemail/commit/14044f843cfacbe78b042f659e379d6b4497aa7c	Patch
https://github.com/roundcube/roundcubemail/commit/495d211638f222336b20f4744545c53712426c2a	Patch
https://github.com/roundcube/roundcubemail/commit/b8f90e28a46d42e79a69568cba897f8f4223d9cd	Patch
https://github.com/roundcube/roundcubemail/releases/tag/1.6.18	Release Notes
https://github.com/roundcube/roundcubemail/releases/tag/1.7.3	Release Notes
https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:roundcube:webmail::::::::
	cpe:2.3:a:roundcube:webmail::::::::

History

No history.

Information

Published : 2026-08-17 13:16

Updated : 2026-09-08 19:09

NVD link : CVE-2026-74997

Mitre link : CVE-2026-74997

CVE.ORG link : CVE-2026-74997

JSON object : View

Products Affected

roundcube

webmail

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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