CVE-2026-34720 | THREATINT

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.

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

LOW: 2.3CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-346: Origin Validation Error

Product status

< 6.5.4

affected

>= 7.0.0-alpha, < 7.0.1

affected

References

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

cve.org (CVE-2026-34720)

nvd.nist.gov (CVE-2026-34720)

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