CVE-2026-34720

MediumCVSS 4.3/10Last modified Jul 24, 2026

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.

Metrics

CVSS 3.1 4.3/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-346

Affected software

Vendor	Product	Versions
zammad	zammad	< 6.5.4; >= 7.0.0-alpha, < 7.0.1

References

https://github.com/zammad/zammad/security/advisories/GHSA-hcv6-w4h9-p2p7Vendor Advisory

Timeline

Published: Apr 8, 2026
Last modified: Jul 24, 2026
NVD status: Analyzed

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