CSRF in Zammad

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…

Vulnerability class: CSRF (Cross-Site Request Forgery)

EPSS: 0.000 (5.3th percentile) — read the EPSS interpretation.

Affected products

  • Zammad — versions < 6.5.4, >= 7.0.0-alpha, < 7.0.1

Weakness classification (CWE)

References