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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
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-16
Advisory published
2026-06-15
Advisory updated
2026-06-16

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50892 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50892

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-50892 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50892

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.