CVE-2026-34721

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the OAuth callback endpoints for Microsoft, Google, and Facebook external credentials do not validate a CSRF state parameter. This vulnerability is fixed in 7.0.1 and 6.5.4.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/zammad/zammad/security/advisories/GHSA-mfwp-hx66-626c	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:zammad:zammad::::::::
	cpe:2.3:a:zammad:zammad:7.0.0:::::::*

History

17 Apr 2026, 15:23

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5
CPE		cpe:2.3:a:zammad:zammad:7.0.0:::::::* cpe:2.3:a:zammad:zammad::::::::
First Time		Zammad zammad Zammad
References	~~() https://github.com/zammad/zammad/security/advisories/GHSA-mfwp-hx66-626c -~~	() https://github.com/zammad/zammad/security/advisories/GHSA-mfwp-hx66-626c - Vendor Advisory

08 Apr 2026, 19:25

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-08 19:25

Updated : 2026-04-17 15:23

NVD link : CVE-2026-34721

Mitre link : CVE-2026-34721

CVE.ORG link : CVE-2026-34721

JSON object : View

Products Affected

zammad

zammad

CWE

CWE-352

Cross-Site Request Forgery (CSRF)

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