Vulnerability in Zammad

CVE-2026-34720

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the SSO mechanism in Zammad was not verifying the header originates from a trusted SSO proxy/gateway before applying further actions on it. This…

EPSS: 0.000 (5.2th percentile) — read the EPSS interpretation.

Affected products

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

Weakness classification (CWE)

CWE-346 — Origin Validation Error

References

https://github.com/zammad/zammad/security/advisories/GHSA-hcv6-w4h9-p2p7 (x_refsource_CONFIRM)