CVE-2026-84460 Zammad: Missing Authorization in TagsController#list Allows Cross-Object Tag Enumeration
Authenticated users can enumerate tags for tickets they do not have access to, potentially exposing sensitive internal labels.
- 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-2026-84460?
CVE-2026-84460 is a medium-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, any authenticated user can call the REST endpoint for getting a tag list and receive the tag names for the given ticket, regardless of whether they have access to that ticket. Tags are an internal categorization feature and may contain sensitive labels. Ticket IDs are sequential integers, making bulk enumeration straightforward. This issue is fixed in version 7.1.2.
Weakness: CWE-639
Which versions are affected by CVE-2026-84460?
How do I fix CVE-2026-84460?
No fix has been published for CVE-2026-84460 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-2026-84460 being exploited?
There is no known exploitation of CVE-2026-84460 in the wild and no public exploit code.
Sources
Also known as GHSA-6vgm-xxp4-p6jv.