# CVE-2026-50892: Nginx Proxy Manager private key disclosure in certificate download endpoint

Source: https://junglewise.ai/threats/cve-2026-50892-nginx-proxy-manager-private-key-disclosure-in-certificate  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-15. Updated: 2026-06-15  
License: CC BY 4.0 with a link back

CVE-2026-50892 · Severity: info · CVSS 6.5 · Published 2026-06-15

Nginx Proxy Manager, a tool used to manage web traffic and security certificates, contains a flaw that allows authorized users to download sensitive security keys. While these users may have permission to view certificates, they should not be able to access the private keys used to encrypt traffic. An attacker with basic account access could use these keys to impersonate the website or intercept private communications, requiring the organization to revoke and replace the affected security certificates.

Technologies: [Nginx Proxy Manager Proxy Manager](https://junglewise.ai/threats/technologies/proxy-manager). Vendors: [Nginx Proxy Manager](https://junglewise.ai/threats/vendors/nginx-proxy-manager).

## Quick answers

**Is CVE-2026-50892 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-50892 being exploited in the wild.

**How severe is CVE-2026-50892?** Informational severity, with a CVSS score of 6.5, published 15 June 2026.

**Which products and versions are affected?** Nginx Proxy Manager Proxy Manager 2.14.0.

**Is there a fix for CVE-2026-50892?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-50892 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-50892?** Check whether you run Nginx Proxy Manager Proxy Manager 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.

## Technical details

An incorrect access control vulnerability exists in the certificate download functionality of Nginx Proxy Manager v2.14.0. The backend handler for the 'GET /api/nginx/certificates/:certificate_id/download' route, located in 'backend/internal/certificate.js', packages the entire contents of the live certificate directory into a ZIP archive. This process fails to filter out sensitive files, resulting in the inclusion of 'privkey.pem' in the download. An authenticated attacker with 'certificates:get' permissions can exploit this to obtain private key material that should remain restricted. This allows for the potential decryption of intercepted traffic or impersonation of the affected TLS endpoints.

## Affected products

- Nginx Proxy Manager Nginx Proxy Manager 2.14.0

## Timeline

- 2026-06-13: other: Vulnerability details shared on GitHub Gist
- 2026-06-15: disclosed: CVE published to NVD dataset

## References

- [https://gist.github.com/pyuysig/2a581564816d0f9240a03bc2d5ce7356](https://gist.github.com/pyuysig/2a581564816d0f9240a03bc2d5ce7356)

## Related threats

- [Nginx Proxy Manager OS command injection in setupCertbotPlugins](https://junglewise.ai/threats/cve-2026-40519-nginx-proxy-manager-os-command-injection-in-setupcertbotplugins)