CVE-2026-34720 — Zammad has an origin validation error in SSO mechanism
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 …
Published: 2026-04-08 · CVSS: 2.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7