Improper Token Masking in Zammad Helpdesk Software
CVE-2026-63208

5.1MEDIUM

Key Information:

Vendor

Zammad

Status
Zammad
Vendor
CVE Published:
25 September 2026

What is CVE-2026-63208?

The Zammad helpdesk system contains a vulnerability where, upon failure of a Microsoft Graph request, error logs may inadvertently expose sensitive authentication tokens. While the software attempts to mask these tokens, only a portion is hidden, leaving the rest visible in plaintext. An admin with access to the Microsoft Graph channel can access these logs, potentially revealing sensitive information such as the account scope and tenant details. This partial exposure could be exploited to reconstruct the complete token, thus compromising authentication integrity. This issue has been addressed in version 7.1.2.

Affected Version(s)

zammad < 7.1.2

References

https://github.com/zammad/zammad/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/zammad/zammad/commit/2be46473eee405cc6...
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CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.