CVE-2026-34719

MEDIUM

4.3

Beschreibung

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.

CVE Details

CVSS v3.1 Bewertung4.3

SchweregradMEDIUM

CVSS VektorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

AngriffsvektorNETWORK

KomplexitatLOW

Erforderliche PrivilegienLOW

BenutzerinteraktionNONE

Veroffentlicht4/8/2026

Zuletzt geandert4/10/2026

Quellenvd

Honeypot-Sichtungen0

Schwachen (CWE)

CWE-918

Referenzen

https://github.com/zammad/zammad/security/advisories/GHSA-2vgc-vfh2-rw75(security-advisories@github.com)

IOC Korrelationen

Keine Korrelationen erfasst

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