CVE-2026-56734
Severity not reportedZammad is a web based open source helpdesk/customer support system.
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.
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/zammad/zammad/commit/1fae97d92496a643ea1490fb17070881e4e091d5 security-advisories@github.com
- https://github.com/zammad/zammad/releases/tag/7.0.2 security-advisories@github.com
- https://github.com/zammad/zammad/security/advisories/GHSA-q3cr-3wq3-29hx security-advisories@github.com