Medium severity4.3NVD Advisory· Published Apr 8, 2026· Updated Apr 17, 2026
CVE-2026-34719
CVE-2026-34719
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.
Affected products
2Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1- github.com/zammad/zammad/security/advisories/GHSA-2vgc-vfh2-rw75nvdVendor Advisory
News mentions
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