Unrated severityNVD Advisory· Published Mar 24, 2026· Updated Mar 24, 2026
NGINX ngx_stream_ssl_module vulnerability
CVE-2026-28755
Description
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_stream_ssl_module module due to the improper handling of revoked certificates when configured with the ssl_verify_client on and ssl_ocsp on directives, 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.
Affected products
1- Range: R36
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1- my.f5.com/manage/s/article/K000160368mitrevendor-advisory
News mentions
2- PoC Code Published for Critical NGINX VulnerabilitySecurityWeek · May 16, 2026
- 18-Year-Old NGINX Rewrite Module Flaw Enables Unauthenticated RCEThe Hacker News · May 14, 2026