CVE-2026-58593

Katalog CVE

CVSS 7.5 · High EPSS 0,29%

Kerentanan Authentication Bypass by Spoofing pada nodebb. Skor CVSS 3.1 7.5 (High) menurut vulncheck.com.

Deskripsi (NVD)

NodeBB 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.

Rincian

Terbit di NVD

1 Juli 2026

Terakhir diubah

7 Juli 2026

Status NVD

Analyzed

CVSS 3.1

7.5 (High), sumber vulncheck.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-290: Authentication Bypass by Spoofing
CWE-345: Insufficient Verification of Data Authenticity

EPSS (30 hari)

0,29% peluang dieksploitasi; lebih tinggi dari 19,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/NodeBB/NodeBB/blob/v4.13.2/src/activitypub/mocks.js exploit · advisory pihak ketiga
• https://github.com/bikini/exploitarium/tree/main/nodebb-activitypub-attributedto-local-uid-spoof-poc exploit · advisory pihak ketiga
• https://www.vulncheck.com/advisories/nodebb-activitypub-author-spoofing-via-unvalidated-attributedto-mapped-to... exploit · advisory pihak ketiga