Authorization Bypass Vulnerability in NodeBB by NodeBB
CVE-2026-120007

6.9MEDIUM

Key Information:

Vendor

Nodebb

Status
Nodebb
Vendor
CVE Published:
30 October 2026

What is CVE-2026-120007?

NodeBB versions 1.18.0 to 4.16.5 are susceptible to an authorization bypass flaw that permits unauthenticated users to manipulate accounts. Specifically, attackers can exploit the /register endpoint by submitting a POST request with an arbitrary user ID (uid). This vulnerability allows them to clear a target's email address at the /register/complete interstitial, thereby revoking all active sessions and compromising account security.

Affected Version(s)

NodeBB 1.18.0 <= 4.16.5

References

https://github.com/NodeBB/NodeBB/commit/376d14abb7fffd8ea...
patch
https://github.com/NodeBB/NodeBB/blob/c3d8dc512292a376f19...
technical-description
https://github.com/NodeBB/NodeBB/blob/c3d8dc512292a376f19...
technical-description

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Zachariah Mithani (AploSec)
julianlam
.