Medium severity4.3NVD Advisory· Published Apr 8, 2026· Updated Apr 17, 2026

CVE-2026-34720

Description

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 products

Zammad/Zammad2 versions
cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:*range: <6.5.4
- cpe:2.3:a:zammad:zammad:7.0.0:*:*:*:*:*:*:*

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

github.com/zammad/zammad/security/advisories/GHSA-hcv6-w4h9-p2p7nvdVendor Advisory

News mentions

No linked articles in our index yet.

cvss	0.280
epss	0.000
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ransomware	0.000