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CVE-2025-15662 · CVSS 8.6 CVE-2025-50455 · CVSS 9.1 CVE-2025-59172 · CVSS 8.5 CVE-2025-68686 · Fortinet FortiOS

vendor

Nodebb

1: vulnerability tracked
1 July 2026: latest publication

cve

Vulnerability watch

idvulnerabilityseveritypublished

CVE-2026-58593NodeBB does not bind the claimed author of an inbound ActivityPub object to the authenticated remote actor. The inbound middleware verifies the HTTP-signature actor and checks the origin of object.id, but never validates that attributedTo corresponds to the sender. In the object mock, attributedTo is used directly as a uid, and actors.assert silently ignores numeric identifiers (filtering them out without re-deriving the uid), so a federated remote actor can set attributedTo to a bare numeric value such as 1 and have the resulting post or private message created with that local uid as author, including the administrator account. This lets a remote attacker forge posts and direct messages attributed to arbitrary local users. Requires the ActivityPub/federation feature to be enabled.Nodebb High CVSS 7.5 01/07