CVE-2026-56724: Zammad: Incorrect implementation of permission checks in the knowledge base module
Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, summary An issue with permission checks in the knowledge base management area has been identified. Under certain conditions, data validation for linked items was not fully enforced. This could have allowed users with limited read permissions to interact with items outside their assigned access scope. Data access has been strengthened in the current version through additional validation routines. This issue is fixed in version 7.0.2.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Zammadto a version that resolves this vulnerability.Fixed in 7.0.2
Event History
Frequently Asked Questions
Who could exploit this issue?
Users with limited read permissions could potentially interact with knowledge base items outside their assigned access scope, under certain conditions involving linked items.
Which deployments are affected?
Zammad versions prior to 7.0.2 are affected. The issue is fixed in version 7.0.2.
What should be done if an upgrade cannot happen immediately?
The provided information does not identify a workaround. Review and restrict limited-read user access to the knowledge base management area and linked items until upgrading to 7.0.2.