medium4.3
CVE-2026-34720
Zammad is a web based open source helpdesk/customer support system.
Impact
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
| Vendor | Product | Affected versions |
|---|---|---|
| Zammad | Zammad | before 6.5.4 Version 7.0.0 |