Auth bypass in Nodebb
CVE-2026-120007
NodeBB 1.18.0 through 4.16.5 contains an authorization bypass vulnerability that allows unauthenticated visitors to act on other accounts by supplying a uid during POST /register. Attackers can submit an empty email at the /register/complete interstitial to clear a victim's email and confirmation state and revoke all their sessions.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/NodeBB/NodeBB/commit/376d14abb7fffd8ea14f3a2f96baa20ffee5cdb3 (patch)
- github.com/NodeBB/NodeBB/blob/c3d8dc512292a376f19e06cb93512bdff2505102/src/cont… (technical-description)
- github.com/NodeBB/NodeBB/blob/c3d8dc512292a376f19e06cb93512bdff2505102/src/user… (technical-description)
- github.com/NodeBB/NodeBB (product)
- www.vulncheck.com/advisories/nodebb-1.18.0-through-4.16.5-authorization-bypass-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-120007?
- CVE-2026-120007 is a medium-severity vulnerability in Nodebb, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-10-30.
- How severe is CVE-2026-120007?
- Medium severity. CVSS v3 base score is 6.5 out of 10.