CVE-2026-56734

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, during federated authentication (OAuth/OIDC/SAML), a profile image URL from the external identity provider is fetched without verifying the target address. An actor who controls their profile at a connected provider may cause the server to connect to internal network locations. Response timing and error patterns differ between reachable and unreachable targets, allowing internal service probing. Worker processes may be blocked for several seconds per request. Requires a configured external authentication provider where the actor can modify their profile image URL. This issue is fixed in version 7.0.2.

CVSS

No CVSS.

References

Link	Resource
https://github.com/zammad/zammad/commit/1fae97d92496a643ea1490fb17070881e4e091d5
https://github.com/zammad/zammad/releases/tag/7.0.2
https://github.com/zammad/zammad/security/advisories/GHSA-q3cr-3wq3-29hx

Configurations

No configuration.

History

25 Sep 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-25 18:17

Updated : 2026-09-29 20:17

NVD link : CVE-2026-56734

Mitre link : CVE-2026-56734

CVE.ORG link : CVE-2026-56734

JSON object : View

Products Affected

No product.

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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