CVE-2026-91846

MISP (≤2.5.45) contains a missing authorization check when adding collection elements from a bare UUID. Because collection elements only store UUIDs that are resolved later by the collection view, the generic add() path could persist a UUID for an Event or Galaxy Cluster that the acting user coul...

CVE-2026-91846 MISP Collection Element Add Missing Authorization on Referenced Object UUID

Affected versions of MISP allow a collection element to be created from a bare UUID without consistently checking whether the acting user is allowed to access the referenced object. The commit explains that collection elements themselves only store UUIDs, while the collection view later resolves...