CVE-2026-56730 Zammad: Missing authorization in GraphQL mutation for suggesting knowledge base answers
An authenticated agent can read unauthorized knowledge base answers due to missing authorization checks in a GraphQL mutation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-56730?
CVE-2026-56730 is a low-severity missing authorization vulnerability in zammad, published on 25 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, an authorization bypass vulnerability was found that allows an authenticated agent to read knowledge base answer content they should not be able to access. The vulnerable GraphQL mutation is meant to transform a knowledge base answer suggestion so it can be inserted into the ticket editor, but it only checks if the user has the ticket.agent permission. Checking the authorization to the knowledge base answer itself is missing. This vulnerability is fixed in 7.0.2.
Weakness: CWE-862
Which versions are affected by CVE-2026-56730?
How do I fix CVE-2026-56730?
No fix has been published for CVE-2026-56730 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-56730 being exploited?
There is no known exploitation of CVE-2026-56730 in the wild and no public exploit code.
Sources
Also known as GHSA-pf47-8964-pp23.