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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| F5 | NGINX Open Source | 1.29.0 – < 1.29.7, 1.27.2 – < 1.28.3 | 1.29.7 |
| F5 | NGINX Plus | R36 – < R36 P3, R35 – < R35 P2, R34, R33 | R36 P3 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | nginx | 1.28.3-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | nginx | 1.28.0-6ubuntu1.2 | — |
| Ubuntu 24.04 LTS | nginx | 1.24.0-2ubuntu7.7 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | nginx +11 | 1.30.0-1.hum1 | RHSA-2026:8346 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | nginx | 1.29.7-1.1 | openSUSE-SU-2026:10423-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | nginx | 1.28.3-r0 | — |
| Alpine v3.23 | nginx | 1.28.3-r0 | — |
| Alpine v3.22 | nginx | 1.28.3-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | nginx +9 | 1:1.28.3-1.amzn2023.0.1 | ALAS2023-2026-1540 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | nginx | 1.28.3-1 | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | nginx-mainline | 1.29.7-r0 | — |
| Wolfi rolling | nginx-stable | 1.28.3-r0 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
ChPratik/NGINX_2026_CVE_Bundle_CTI_Report ★ 0 · Jul 28, 2026
Covered CVEs: CVE-2026-28755, CVE-2026-42926, CVE-2026-9256, CVE-2026-42055, CVE-2026-42533
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 5
- WID-SEC-2026-0860 NGINX und NGINX Plus: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- WID-SEC-2026-2933 Splunk SOAR: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 2, 2026
- RHSA-2026:8346 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- ALAS2023-2026-1540 Important: nginx security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Apr 13, 2026
- openSUSE-SU-2026:10423-1 nginx-1.29.7-1.1 on GA media SUSE / openSUSE Security Updates · Mar 26, 2026
References
- https://my.f5.com/manage/s/article/K000160368 vendor-advisory