Medium 5.3Published Sep 25, 2026

CVE-2026-56728Zammad: Cross-User Taskbar Item Access Control Vulnerability

Updated under an hour ago (2026-10-19 05:50 UTC)

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Every CVE for zammad

Exploited in the last 30 days

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: 5.3 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-200, CWE-639
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 25, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

zammad zammad zammad:zammad (from the name)	before 7.0.2	CNA record

References

https://github.com/zammad/zammad/security/advisories/GHSA-jvcg-5539-vvc3x-refsource-confirm
https://github.com/zammad/zammad/commit/4ccd5d573023b66b0d0184914c92417e1780793fx-refsource-misc
https://github.com/zammad/zammad/releases/tag/7.0.2x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.