Vulnerability Description
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when a Microsoft Graph request fails, Zammad logs the error including the authentication token used to access the mailbox. The system attempts to hide this token in the log, but the masking is incomplete: for the token format Microsoft uses (JWT), only the first part is hidden, while the remaining parts remain readable in plain text. A Zammad admin with Microsoft Graph channel access can view these logs and see the partial token, which may reveal sensitive claims such as the account scope, tenant, or timing, and could assist in reconstructing the full token while it is still valid. This issue is fixed in version 7.1.2.
Related Weaknesses (CWE)
References
- https://github.com/zammad/zammad/commit/2be46473eee405cc65b86a85d17059802e658532
- https://github.com/zammad/zammad/security/advisories/GHSA-qh8m-g5vr-7272
FAQ
What is CVE-2026-63208?
CVE-2026-63208 is a documented vulnerability. Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when a Microsoft Graph request fails, Zammad logs the error including the authentication token used to access the ma...
How severe is CVE-2026-63208?
CVSS scoring is not yet available for CVE-2026-63208. Check NVD for updates.
Is there a patch for CVE-2026-63208?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.