CVE-2026-91825

MISP versions ≤2.5.45 contain an authorization bypass in the event-edit path. When a request supplied a non-empty sharing_group_id but omitted the distribution field , the authorization check (which only fired for distribution = 4) was skipped. MISP's field-recovery logic then restored the existi...

CVE-2026-91825 MISP: Missing Authorization Check for Event Sharing Group When Distribution Field Is Omitted During Edit

Affected versions of MISP fail to authorize a submitted sharing group in a specific event-edit path. The vulnerable logic checked whether the acting user could use a sharinggroupid only when the request explicitly supplied distribution = 4. If the attacker instead omitted distribution but supplie...

CVE-2026-54398 MISP object edit authorization bypass allows unauthorized sharing group assignment

An authorization flaw in MISP’s object add/edit handling allowed an authenticated user with object editing permissions to assign a MISP object, or attributes contained within an object, to a sharing group that the user was not authorized to use or view. When editing objects, the sharing group...