CVE-2026-86283

MISP's UiBeta theme collection view (app/View/Themed/UiBeta/Collections/view.ctp) performed a secondary query of member events by UUID without applying the caller's access control list (ACL). The CollectionsController::view() action correctly resolved collection element UUIDs through Event::fetchSimpleEvents($user, ...), which enforces per-user event ACL. However, the view template independently re-queried the same UUIDs using only an Event.uuid IN (...) condition, omitting the createEventConditions() authorization filter. Because collection element UUIDs are stored without server-side authorization against the referenced event (CollectionElementsController::add() accepts whatever UUID the collection owner posts), an authenticated user with view access to a collection could retrieve full details of events they are not permitted to read. The exposed data included event identifiers, info, dates, timestamps, creator organization, all event tags, and galaxy clusters (the latter attached via a cluster-scoped rather than event-scoped ACL check). This constitutes an authorization bypass at the presentation layer, allowing horizontal privilege escalation across event boundaries within the MISP instance.

CVSS

No CVSS.

References

Link	Resource
https://github.com/MISP/MISP/commit/44573e4a8

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-06 15:17

Updated : 2026-09-08 19:20

NVD link : CVE-2026-86283

Mitre link : CVE-2026-86283

CVE.ORG link : CVE-2026-86283

JSON object : View

Products Affected

No product.

CWE

CWE-285

Improper Authorization

CWE-862

Missing Authorization

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