CVE-2026-34837 Zammad is miissing authorization in AI assistance controller for context data used in text tools
An authenticated agent can access unauthorized context data in AI prompts due to missing authorization checks in the Zammad helpdesk system.
- 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-2026-34837?
CVE-2026-34837 is a medium-severity missing authorization vulnerability in Zammad Zammad, published on 8 Apr 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 7.0.1, he REST endpoint POST /api/v1/ai_assistance/text_tools/:id contains an authorization failure. Context data (e.g., a group or organization) supplied to be used in the AI prompt were not checked if they are accessible for the current user. This leads to having data present in the AI prompt that were not authorized before being used. A user needs to have ticket.agent permission to be able to use the provided context data. This vulnerability is fixed in 7.0.1.
Weakness: CWE-862
Which versions are affected by CVE-2026-34837?
It affects 1 product.
Products include Zammad Zammad.
How do I fix CVE-2026-34837?
No fix has been published for CVE-2026-34837 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-2026-34837 being exploited?
There is no known exploitation of CVE-2026-34837 in the wild and no public exploit code.
Other vulnerabilities in Zammad Zammad
Sources
Also known as GHSA-89vv-6639-wcv8.