CVE-2026-34719
Published: Apr 8, 2026
Modified: Apr 10, 2026
Description
Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the webhook model was missing a proper validation for loop back addresses, or link-local addresses — only the URL scheme (HTTP/HTTPS) as well as the hostname was checked. This could end up in retrieving confidential metadata of cloud/hosting providers. The existing check is now extended and is applied when configuring webhooks as well as triggering webhook jobs. This vulnerability is fixed in 7.0.1 and 6.5.4.
| Vendor | Product | Versions |
|---|---|---|
zammad | zammad | affected < 6.5.4affected >= 7.0.0-alpha, < 7.0.1 |
Weaknesses (CWE)
References
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