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.
CVE-2026-93964
MEDIUMPre-NVD 5.35.3—Trending — 5 sources updated this week
EchelonGraph scoreHIGH confidence
Score 5.3 from GitHub Security Advisory published 2026-09-20. a secondary CVSS source baseline 5.3; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.3
- EG Score
- 5.3(high)
- EG Risk
- 28(Track)EG Risk 28/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity53% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 20%
- KEV
- Not listed
Published
September 20, 2026
Last Modified
September 20, 2026
Advisory Details (2)
Auto-updated Sep 20, 2026No patch confirmed yet.
generic
GitHub - NginxProxyManager/nginx-proxy-manager: Docker container for managing Nginx proxy hosts with a simple, powerful interface · GitHub
https://github.com/NginxProxyManager/nginx-proxy-manager/generic
[Security] Unauthenticated Certificate Validation Endpoint · Issue #5594 · NginxProxyManager/nginx-proxy-manager · GitHub
https://github.com/NginxProxyManager/nginx-proxy-manager/issues/5594Vendor Advisories for CVE-2026-93964(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 8× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-21 08:14 UTCEG score recompute
- 2026-09-21 08:14 UTCGHSA enrichment
- 2026-09-20 20:16 UTCEPSS rescore
- 2026-09-20 06:40 UTCEG score recompute
- 2026-09-20 06:39 UTCGHSA enrichment
- 2026-09-20 06:33 UTCNVD updateCVSS v4 → 5.5
- 2026-09-20 05:36 UTCEG score recompute
- 2026-09-20 05:35 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-287
Frequently asked(5)
What is CVE-2026-93964?
CVE-2026-93964 is a medium vulnerability published on September 20, 2026. 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…
When was CVE-2026-93964 disclosed?
CVE-2026-93964 was first published in the National Vulnerability Database on September 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-93964 actively exploited?
CVE-2026-93964 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 80.1% of all scored CVEs.
What is the CVSS score of CVE-2026-93964?
CVE-2026-93964 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-93964?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-93964, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-93964
Is Your Infrastructure Affected by CVE-2026-93964?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.