CVE-2026-34720 — Zammad has an origin validation error in SSO mechanism

CVE-2026-34720

Zammad has an origin validation error in SSO mechanism PUBLISHED

Description (CNA)

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 vulnerability is fixed in 7.0.1 and 6.5.4.

Affected (CNA)

Vendor / product	Versions
zammad / zammad	affected < 6.5.4; affected >= 7.0.0-alpha, < 7.0.1

CWE

CWE-346

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.