CVE-2026-104912: Access Control Flaw

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check becomes incorrect when an event is subsequently restricted (for example, its sharing group is changed or it is unpublished).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.

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Weakness Type (CWE)

CWE-284 CWE-284

CWE-862 Missing Authorization

References

Other References

https://github.com/MISP/MISP/commit/100235bd9

Frequently Asked Questions

What is CVE-2026-104912? +

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check becomes incorrect when an event is subsequently restricted (for example, its sharing group is changed or it is unpublished).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.

How do I check if I'm vulnerable to CVE-2026-104912? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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