CVE-2026-34719

MEDIUM

4.3

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.

Details CVE

Score CVSS v3.14.3

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisLOW

Interaction utilisateurNONE

Publie4/8/2026

Derniere modification4/17/2026

Sourcenvd

Observations honeypot0

Produits affectes

zammad:zammad

Faiblesses (CWE)

CWE-918

References

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

Correlations IOC

Aucune correlation enregistree

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