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CVE-2026-34721

Published: Apr 8, 2026

Modified: Apr 9, 2026

PUBLISHED

Description

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.

Vendor	Product	Versions
zammad	zammad	affected `< 6.5.4` affected `>= 7.0.0-alpha, < 7.0.1`

Weaknesses (CWE)

References

https://github.com/zammad/zammad/security/advisories/GHSA-mfwp-hx66-626c

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