CVE-2026-34719 | BDVDB-2026-325690 Detail

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.

Impact#

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Exploit#

History#

1. Version 12026-04-08Record published in the CVE List.
2. Version 22026-04-10Most recent update recorded in the CVE List.