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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.

PUBLISHED Reserved 2026-03-30 | Published 2026-04-08 | Updated 2026-04-09 | Assigner GitHub_M




MEDIUM: 5.9CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-352: Cross-Site Request Forgery (CSRF)

Product status

< 6.5.4
affected

>= 7.0.0-alpha, < 7.0.1
affected

References

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

cve.org (CVE-2026-34721)

nvd.nist.gov (CVE-2026-34721)

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