Information Disclosure in Zammad Helpdesk System by Zammad
CVE-2026-56726

5.1MEDIUM

Key Information:

Vendor

Zammad

Status
Zammad
Vendor
CVE Published:
25 September 2026

What is CVE-2026-56726?

The Zammad helpdesk system has a vulnerability that permits any authenticated agent to access information related to tickets they are not assigned to. Agents can view ticket titles, statuses, labels, and URLs connected to GitHub/GitLab issues. This breach of ticket isolation allows for potential data exposure, where internal users can systematically query ticket IDs to gain insights into the system’s internal communications and linked external issues. The issue is resolved in version 7.0.2, emphasizing the necessity for users to update their systems to safeguard sensitive data.

Affected Version(s)

zammad < 7.0.2

References

https://github.com/zammad/zammad/security/advisories/GHSA...
x_refsource_CONFIRM
https://github.com/zammad/zammad/commit/c767f32c006ff9842...
x_refsource_MISC
https://github.com/zammad/zammad/commit/e50ef69beab897317...
x_refsource_MISC

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:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.