# CVE-2026-84313: Nginx UI TOTP and passkey enrollment missing re-authentication

Source: https://junglewise.ai/threats/cve-2026-84313-nginx-ui-totp-passkey-enrolment-requires-no-re-authentication  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-12. Updated: 2026-10-15  
License: CC BY 4.0 with a link back

CVE-2026-84313 · Severity: high · CVSS 8.8 · Published 2026-10-12

Nginx UI's two-factor authentication enrollment endpoints lack password re-entry checks, allowing an attacker with a stolen session token to attach their own authenticator to a victim's account. Once enrolled, the attacker's authenticator becomes required for all logins, persisting even after password changes and locking out the legitimate user.

Technologies: [github.com/0xJacky/Nginx-UI (Go)](https://junglewise.ai/threats/technologies/github-com-0xjacky-nginx-ui). Vendors: [Go](https://junglewise.ai/threats/vendors/go), [NGINX](https://junglewise.ai/threats/vendors/nginx).

## Quick answers

**Is CVE-2026-84313 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-84313 being exploited in the wild.

**How severe is CVE-2026-84313?** High severity, with a CVSS score of 8.8, published 12 October 2026.

**Which products and versions are affected?** github.com/0xJacky/Nginx-UI (Go) SEMVER:introduced=0; Nginx-UI (Go) < 1.9.10-0.20260703131214-23d1934099b0, SEMVER:introduced=0,fixed=1.9.10-0.20260703131214-23d1934099b0; Nginx UI <UNKNOWN>.

**Is there a fix for CVE-2026-84313?** Yes. Nginx-UI (Go): upgrade to 1.9.10-0.20260703131214-23d1934099b0 or later. Until then: Monitor the `users` table for unexpected `OTPSecret` values and the `passkeys` table for unexpected rows to detect unauthorized second-factor enrollment. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-84313 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-84313?** Check whether you run github.com/0xJacky/Nginx-UI (Go), Nginx-UI (Go) or Nginx UI at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Nginx-UI (Go): upgrade to 1.9.10-0.20260703131214-23d1934099b0 or later

  ```sh
  go get Nginx-UI@v1.9.10-0.20260703131214-23d1934099b0
  ```


Monitor the `users` table for unexpected `OTPSecret` values and the `passkeys` table for unexpected rows to detect unauthorized second-factor enrollment.

## Technical details

The TOTP enrollment (`POST /api/otp_enroll`) and passkey registration (`POST /api/finish_passkey_register`) endpoints require only a valid JWT and are registered outside the secure-session middleware group. An attacker can supply their own TOTP secret or passkey, with the server validating only that the provided passcode matches the supplied secret—no current-password verification occurs. This enables persistent account takeover and is exacerbated by a separate RequireSecureSession bypass affecting non-OTP users.

## Affected products

- Nginx Nginx UI <UNKNOWN>

## Identifiers

- CVE-2026-84313
- GHSA-gfrc-g87h-7h5w
- GO-2026-6786

## Timeline

- 2026-10-15: disclosed

## Related threats

- [Nginx UI Casdoor SSO login CSRF via constant state parameter](https://junglewise.ai/threats/cve-2026-84312-nginx-ui-casdoor-sso-callback-uses-a-constant-state-parameter)
- [Nginx UI OTP secure-session step-up bypass via MCP](https://junglewise.ai/threats/cve-2026-84360-nginx-ui-otp-secure-session-step-up-can-be-bypassed-via-mcp)
- [Nginx UI short token cache bypass after account re-enable](https://junglewise.ai/threats/cve-2026-84321-nginx-ui-standalone-short-tokens-survive-administrative)
- [Nginx UI auto backup path traversal in storage boundary](https://junglewise.ai/threats/cve-2026-84320-nginx-ui-auto-backup-name-allows-path-traversal-outside-validated)
- [Nginx UI MCP configuration directive validation bypass](https://junglewise.ai/threats/cve-2026-84319-nginx-ui-mcp-configuration-tools-bypass-restricted-directive)