medium5.4
CVE-2026-28755
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 …
Impact
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
| Vendor | Product | Affected versions |
|---|---|---|
| F5 | Nginx Plus | Versions r33, r34, r35, r36 |
| F5 | Nginx Open Source | from 0.5.13 through 0.9.7 from 1.27.2 before 1.28.3 from 1.29.0 before 1.29.7 |