| Name | 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| nginx (PTS) | bullseye | 1.18.0-6.1+deb11u3 | fixed |
| bullseye (security) | 1.18.0-6.1+deb11u6 | fixed |
| bookworm | 1.22.1-9+deb12u6 | fixed |
| bookworm (security) | 1.22.1-9+deb12u7 | fixed |
| trixie | 1.26.3-3+deb13u4 | fixed |
| trixie (security) | 1.26.3-3+deb13u5 | fixed |
| forky | 1.30.0-2 | fixed |
| sid | 1.30.1-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| nginx | source | bullseye | (not affected) | | | |
| nginx | source | bookworm | (not affected) | | | |
| nginx | source | trixie | (not affected) | | | |
| nginx | source | (unstable) | 1.28.3-2 | | | |
Notes
[trixie] - nginx <not-affected> (Vulnerable code introduced later)
[bookworm] - nginx <not-affected> (Vulnerable code introduced later)
[bullseye] - nginx <not-affected> (Vulnerable code introduced later)
https://my.f5.com/manage/s/article/K000160368
Introduced with: https://github.com/nginx/nginx/commit/581cf22673fc63e206693294161ea32e691a432f (release-1.27.2)
Fixed by: https://github.com/nginx/nginx/commit/78f581487706f2e43eea5a060c516fc4d98090e8 (release-1.28.3)