PatchSiren cyber security CVE debrief

CVE-2026-50892 Nginx Proxy Manager CVE debrief

CVE-2026-50892 is an incorrect access control vulnerability in the 'Let's Encrypt' certificate download endpoint of Nginx Proxy Manager v2.14.0. Authenticated attackers can obtain the TLS private key material via a crafted GET request.

Vendor: Nginx Proxy Manager
Product: Nginx Proxy Manager
CVSS: Unknown
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-15
Original CVE updated: 2026-06-15
Advisory published: 2026-06-15
Advisory updated: 2026-06-15

Who should care

Users of Nginx Proxy Manager v2.14.0, especially those who have exposed the 'Let's Encrypt' certificate download endpoint to authenticated users.

Technical summary

The vulnerability exists in the 'Let's Encrypt' certificate download endpoint of Nginx Proxy Manager v2.14.0. Due to incorrect access control, authenticated attackers can craft a GET request to obtain the TLS private key material.

Defensive priority

High

Recommended defensive actions

Update Nginx Proxy Manager to a version that fixes the vulnerability, if available.
Restrict access to the 'Let's Encrypt' certificate download endpoint to only trusted users and services.
Monitor the endpoint for suspicious activity and implement additional security measures, such as IP whitelisting or rate limiting.

Evidence notes

The CVE record [resourceLinkAnnotations:cve-org] and NVD detail [resourceLinkAnnotations:nvd] provide official information about the vulnerability. A source reference [resourceLinkAnnotations:ref-4] is also available.

Official resources

CVE-2026-50892 was published on 2026-06-15T20:16:32.210Z and has not been modified since then.