Unauthenticated certificate processing via unguarded validation route
Published Sep 20, 2026 · Updated Sep 20, 2026
Missing authentication in Nginx Proxy Manager 2.15.1 and earlier allows remote attackers to invoke certificate validation without a token. The validation route passes submitted certificate and key data to internalCertificate.validate, which writes temporary files and invokes OpenSSL without enforcing the documented bearer permission. The endpoint analyzes only attacker-supplied material and does not expose stored certificates, so the grounded consequence is unauthenticated cryptographic processing rather than data theft.
Summary
What happened
Missing authentication in Nginx Proxy Manager 2.15.1 and earlier allows remote attackers to invoke certificate validation without a token. The validation route passes submitted certificate and key data to internalCertificate.validate, which writes temporary files and invokes OpenSSL without enforcing the documented bearer permission. The endpoint analyzes only attacker-supplied material and does not expose stored certificates, so the grounded consequence is unauthenticated cryptographic processing rather than data theft.
The record
- CVE
- CVE-2026-93964
- Published
- Sep 20, 2026
- Updated
- Sep 20, 2026
- Vendor
- Nginx Proxy Manager
- Product
- Nginx Proxy Manager
- Classifications
- CWE-287, CWE-306, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 20, 2026CVE publishedPublication date reported by the CVE source.
- Sep 20, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2.0
- Affected versionversion=2.1
- Affected versionversion=2.10
- Affected versionversion=2.1.0
- Affected versionversion=2.10.0
- Affected versionversion=2.10.1
- Affected versionversion=2.10.2
- Affected versionversion=2.10.3
- Affected versionversion=2.10.4
- Affected versionversion=2.11
- Affected versionversion=2.1.1
- Affected versionversion=2.12
- Affected versionversion=2.1.2
- Affected versionversion=2.13
- Affected versionversion=2.14.0
- Affected versionversion=2.15.0
- Affected versionversion=2.15.1
- Affected versionversion=2.2
- Affected versionversion=2.2.0
- Affected versionversion=2.2.1
- Affected versionversion=2.2.2
- Affected versionversion=2.2.3
- Affected versionversion=2.2.4
- Affected versionversion=2.3
- Affected versionversion=2.3.0
- Affected versionversion=2.3.1
- Affected versionversion=2.4
- Affected versionversion=2.4.0
- Affected versionversion=2.5
- Affected versionversion=2.5.0
- Affected versionversion=2.6
- Affected versionversion=2.6.0
- Affected versionversion=2.6.1
- Affected versionversion=2.6.2
- Affected versionversion=2.7
- Affected versionversion=2.7.0
- Affected versionversion=2.7.1
- Affected versionversion=2.7.2
- Affected versionversion=2.7.3
- Affected versionversion=2.8
- Affected versionversion=2.8.0
- Affected versionversion=2.8.1
- Affected versionversion=2.9
- Affected versionversion=2.9.0
- Affected versionversion=2.9.1
- Affected versionversion=2.9.10
- Affected versionversion=2.9.11
- Affected versionversion=2.9.12
- Affected versionversion=2.9.13
- Affected versionversion=2.9.14
- Affected versionversion=2.9.15
- Affected versionversion=2.9.16
- Affected versionversion=2.9.17
- Affected versionversion=2.9.18
- Affected versionversion=2.9.19
- Affected versionversion=2.9.2
- Affected versionversion=2.9.20
- Affected versionversion=2.9.21
- Affected versionversion=2.9.22
- Affected versionversion=2.9.3
- Affected versionversion=2.9.4
- Affected versionversion=2.9.5
- Affected versionversion=2.9.6
- Affected versionversion=2.9.7
- Affected versionversion=2.9.8
- Affected versionversion=2.9.9
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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