CVE-2026-56728

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, a broken access control vulnerability exists in Zammad's GraphQL API. An authenticated user can access taskbar item data belonging to another user by crafting a request with the target user's taskbar identifier. The taskbar feature stores transient state for active user sessions, including auto-saved ticket drafts. Under certain conditions, the authorization check for taskbar item access is not enforced, allowing a user to read another user's taskbar item data. This vulnerability is fixed in 7.0.2.

CVSS

No CVSS.

References

Link	Resource
https://github.com/zammad/zammad/commit/4ccd5d573023b66b0d0184914c92417e1780793f
https://github.com/zammad/zammad/releases/tag/7.0.2
https://github.com/zammad/zammad/security/advisories/GHSA-jvcg-5539-vvc3

Configurations

No configuration.

History

25 Sep 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-25 18:17

Updated : 2026-09-28 14:45

NVD link : CVE-2026-56728

Mitre link : CVE-2026-56728

CVE.ORG link : CVE-2026-56728

JSON object : View

Products Affected

No product.

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

CWE-639

Authorization Bypass Through User-Controlled Key

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