CVE-2026-34720
Medium
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.
SeverityMedium
CVSS4.3
Exploit probability—
Product
Zammad
PublishedApr 8, 2026
First seenApr 8, 2026
Weakness typeCWE-346CWE-346
How to fix
Update
- zammad zammad6.5.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| zammad zammad | v < 6.5.4, 7.0.0 | 6.5.4 |
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