CVE-2026-93964
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
A vulnerability was detected in NginxProxyManager (nginx-proxy-manager) up to version 2.15.1 in the internalCertificate.validate function of the file backend/internal/certificate.js (Validate Route component). Manipulation results in missing authentication, and the attack can be launched remotely. The exploit is now public and may be used; the endpoint only processes and echoes back the certificate submitted by the caller, and the real risk is unauthenticated openssl processing of attacker input.
Risk Assessment
Missing authentication on this endpoint allows an attacker to remotely trigger openssl operations on arbitrary input, potentially leading to resource exhaustion or other side effects, and the public exploit increases the likelihood of exploitation.
Recommendation
Restrict access to the Validate Route endpoint by requiring authentication and consider updating to a fixed version once available, as the project has not yet responded to the report.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

