Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
4DescriptionCVE.org
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_stream_ssl_module due to the improper handling of revoked certificates when configured with ssl_verify_client on and ssl_ocsp on, allowing the TLS handshake to succeed even after an OCSP check identifies the certificate as revoked.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
AnalysisAI
NGINX Plus and NGINX Open Source contain an authentication bypass vulnerability in the ngx_stream_ssl_module where revoked certificates are incorrectly accepted during TLS handshakes despite OCSP checking. When ssl_verify_client and ssl_ocsp are both enabled, the module fails to properly enforce certificate revocation status, allowing clients with revoked certificates to establish connections. This affects both commercial NGINX Plus and open-source NGINX deployments with a CVSS score of 5.4 (Medium), representing a localized confidentiality and integrity impact requiring authenticated attackers.
Technical ContextAI
The vulnerability exists in NGINX's stream SSL module (ngx_stream_ssl_module), which handles TLS certificate validation for stream-based connections. The root cause is classified under CWE-863 (Incorrect Authorization), specifically involving improper handling of certificate revocation status returned by OCSP (Online Certificate Status Protocol) responders. When both ssl_verify_client (which requires client certificate validation) and ssl_ocsp (which enables OCSP stapling/checking) directives are enabled, the module fails to deny the handshake when OCSP responses indicate a revoked certificate. This affects CPE entries cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:* and cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:*, indicating the flaw impacts all versions across both product lines (subject to End of Technical Support constraints).
RemediationAI
Apply the security patch provided by F5 for NGINX Plus and NGINX Open Source via the official security advisory at https://my.f5.com/manage/s/article/K000160368, ensuring your specific NGINX version has an available patch and has not reached End of Technical Support. Until patching is possible, implement compensating controls by disabling ssl_ocsp temporarily if your threat model permits, enforcing certificate pinning at the application layer, or restricting client certificate acceptance to pre-approved certificate fingerprints and serial numbers maintained in an allowlist. For production environments using mutual TLS, consider implementing a reverse proxy or WAF capable of performing independent OCSP validation and certificate revocation checks before allowing connections to reach NGINX.
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Same weakness CWE-863 – Incorrect Authorization
View allSame technique Authentication Bypass
View allVendor StatusVendor
SUSE
Severity: Medium| Product | Status |
|---|---|
| openSUSE Tumbleweed | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | Fixed |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | Fixed |
| SUSE Linux Enterprise Server 15 SP7 | Fixed |
| SUSE Linux Enterprise Server 16.0 | Fixed |
| SUSE Linux Enterprise Server 16.1 | Fixed |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | Fixed |
| SUSE Linux Enterprise Server for SAP applications 16.0 | Fixed |
| SUSE Linux Enterprise Server for SAP applications 16.1 | Fixed |
| openSUSE Leap 15.6 | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | Fixed |
| SUSE Linux Enterprise Module for Server Applications 15 SP4 | Fixed |
| SUSE Linux Enterprise Module for Server Applications 15 SP5 | Fixed |
| SUSE Linux Enterprise Module for Server Applications 15 SP6 | Fixed |
| SUSE Linux Enterprise Server 15 SP4 | Fixed |
| SUSE Linux Enterprise Server 15 SP4-LTSS | Fixed |
| SUSE Linux Enterprise Server 15 SP5 | Fixed |
| SUSE Linux Enterprise Server 15 SP5-LTSS | Fixed |
| SUSE Linux Enterprise Server 15 SP6 | Fixed |
| SUSE Linux Enterprise Server 15 SP6-LTSS | Fixed |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | Fixed |
| SUSE Manager Proxy 4.3 | Fixed |
| SUSE Manager Proxy LTS 4.3 | Fixed |
| SUSE Manager Retail Branch Server 4.3 | Fixed |
| SUSE Manager Retail Branch Server LTS 4.3 | Fixed |
| SUSE Manager Server 4.3 | Fixed |
| SUSE Manager Server LTS 4.3 | Fixed |
| SUSE CaaS Platform 4.0 | Fixed |
| SUSE Enterprise Storage 6 | Fixed |
| SUSE Enterprise Storage 7 | Fixed |
| SUSE Enterprise Storage 7.1 | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | Fixed |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | Fixed |
| SUSE Linux Enterprise Module for Server Applications 15 SP1 | Fixed |
| SUSE Linux Enterprise Module for Server Applications 15 SP2 | Fixed |
| SUSE Linux Enterprise Module for Server Applications 15 SP3 | Fixed |
| SUSE Linux Enterprise Real Time 15 SP2 | Fixed |
| SUSE Linux Enterprise Real Time 15 SP3 | Fixed |
| SUSE Linux Enterprise Real Time 15 SP4 | Fixed |
| SUSE Linux Enterprise Server 15 SP1 | Fixed |
| SUSE Linux Enterprise Server 15 SP1-BCL | Fixed |
| SUSE Linux Enterprise Server 15 SP1-LTSS | Fixed |
| SUSE Linux Enterprise Server 15 SP2 | Fixed |
| SUSE Linux Enterprise Server 15 SP2-BCL | Fixed |
| SUSE Linux Enterprise Server 15 SP2-LTSS | Fixed |
| SUSE Linux Enterprise Server 15 SP3 | Fixed |
| SUSE Linux Enterprise Server 15 SP3-BCL | Fixed |
| SUSE Linux Enterprise Server 15 SP3-LTSS | Fixed |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | Fixed |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | Fixed |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | Fixed |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | Fixed |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | Fixed |
| SUSE Manager Proxy 4.0 | Fixed |
| SUSE Manager Proxy 4.1 | Fixed |
| SUSE Manager Proxy 4.2 | Fixed |
| SUSE Manager Retail Branch Server 4.0 | Fixed |
| SUSE Manager Retail Branch Server 4.1 | Fixed |
| SUSE Manager Retail Branch Server 4.2 | Fixed |
| SUSE Manager Server 4.0 | Fixed |
| SUSE Manager Server 4.1 | Fixed |
| SUSE Manager Server 4.2 | Fixed |
| openSUSE Leap 15.3 | Fixed |
| openSUSE Leap 15.4 | Fixed |
| openSUSE Leap 15.5 | Fixed |
| private-registry/harbor-nginx private-registry/harbor-portal suse/nginx suse/rmt-nginx | Fixed |
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-14887
GHSA-hgfr-jmpr-2p89