Vulnerability in Nodebb
CVE-2026-58593
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…
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Nodebb — versions 4.13.2
Weakness classification (CWE)
References
- disclosure@vulncheck.com (exploit)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-58593?
- CVE-2026-58593 is a high-severity vulnerability in Nodebb, classified under Authentication Bypass by Spoofing. CVSS score: 7.5/10. Published 2026-07-01.
- How severe is CVE-2026-58593?
- High severity. CVSS v3 base score is 7.5 out of 10.