Vulnerability Description
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.
Related Weaknesses (CWE)
References
- 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
FAQ
What is CVE-2026-56728?
CVE-2026-56728 is a documented vulnerability. 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 ...
How severe is CVE-2026-56728?
CVSS scoring is not yet available for CVE-2026-56728. Check NVD for updates.
Is there a patch for CVE-2026-56728?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.