CVE-2026-63204 Zammad: Authenticated agents can read AI summary error messages from inaccessible tickets
Authenticated agents can read AI error messages from tickets they are not authorized to access, exposing limited provider error details.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-63204?
CVE-2026-63204 is a low-severity missing authorization vulnerability in zammad, published on 25 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, an authenticated user with agent permissions can supply an arbitrary AI analytics run identifier to the ticket summarize endpoint and receive the AI provider error message stored for that run, even if the run belongs to a ticket the agent is not authorized to access. The disclosure is limited to the provider error string; ticket content is not exposed. This issue is fixed in version 7.1.2.
Which versions are affected by CVE-2026-63204?
How do I fix CVE-2026-63204?
No fix has been published for CVE-2026-63204 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-2026-63204 being exploited?
There is no known exploitation of CVE-2026-63204 in the wild and no public exploit code.
Sources
Also known as GHSA-75j9-hpg4-j9f8.