CVE-2026-104912 MISP Correlation Authorization Bypass Exposes Restricted Event and Attribute Data
Authenticated users can view restricted event data due to stale correlation authorization checks in MISP.
- 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-2026-104912?
CVE-2026-104912 is a high-severity missing authorization vulnerability in MISP, published on 2 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
MISP contains an authorization flaw in its correlation handling during attribute searches. When a user performs an attribute search that triggers correlation lookups, the system authorized access to correlated attributes and events based on a stale distribution snapshot stored on the correlation row rather than the live event access control list.
Because the correlation row's distribution columns are a point-in-time copy that lacks a published flag, the authorization check becomes incorrect when an event is subsequently restricted (for example, its sharing group is changed or it is unpublished). As a result, an authenticated user could retrieve attributes and event details belonging to events they no longer have permission to view.
Preconditions:
- An authenticated user with at least read access to some events in the instance.
- The existence of correlations between events, at least one of which has been restricted after the correlation was created.
Impact:
- Confidentiality: exposure of attribute values and event metadata that the user is not authorized to access.
Affected versions: MISP prior to v2.5.48.
Which versions are affected by CVE-2026-104912?
How do I fix CVE-2026-104912?
No fix has been published for CVE-2026-104912 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-2026-104912 being exploited?
There is no known exploitation of CVE-2026-104912 in the wild and no public exploit code.
Sources
Also known as GHSA-w4mw-2637-h8xp.