# CVE-2026-28755: NGINX ngx_stream_ssl_module vulnerability

CVE-2026-28755 is fixed in 29 products on 1 platform, first by libnginx-mod-http-geoip 1.24.0-2ubuntu7.7, released March 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-28755
- Priority: Routine
- CVSS: 5.4 (Moderate)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 24, 2026
- Weakness: Incorrect Authorization
- Vendor advisory: https://msrc.microsoft.com/update-guide/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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libnginx-mod-http-geoip Ubuntu 24.04.5 LTS (noble) | 1.24.0-2ubuntu7.7 | [libnginx-mod-http-geoip 1.24.0-2ubuntu7.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnginx-mod-http-geoip-1.24.0-2ubuntu7.7.md) | Mar 24, 2026 |
| Linux | libnginx-mod-http-geoip Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.2 | [libnginx-mod-http-geoip 1.28.0-6ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnginx-mod-http-geoip-1.28.0-6ubuntu1.2.md) | Mar 24, 2026 |
| Linux | libnginx-mod-http-image-filter Ubuntu 24.04.5 LTS (noble) | 1.24.0-2ubuntu7.7 | [libnginx-mod-http-image-filter 1.24.0-2ubuntu7.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnginx-mod-http-image-filter-1.24.0-2ubuntu7.7.md) | Mar 24, 2026 |
| Linux | libnginx-mod-http-image-filter Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.2 | [libnginx-mod-http-image-filter 1.28.0-6ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnginx-mod-http-image-filter-1.28.0-6ubuntu1.2.md) | Mar 24, 2026 |
| Linux | libnginx-mod-http-perl Ubuntu 24.04.5 LTS (noble) | 1.24.0-2ubuntu7.7 | [libnginx-mod-http-perl 1.24.0-2ubuntu7.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnginx-mod-http-perl-1.24.0-2ubuntu7.7.md) | Mar 24, 2026 |
| Linux | libnginx-mod-http-perl Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.2 | [libnginx-mod-http-perl 1.28.0-6ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnginx-mod-http-perl-1.28.0-6ubuntu1.2.md) | Mar 24, 2026 |
| Linux | libnginx-mod-http-xslt-filter Ubuntu 24.04.5 LTS (noble) | 1.24.0-2ubuntu7.7 | [libnginx-mod-http-xslt-filter 1.24.0-2ubuntu7.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnginx-mod-http-xslt-filter-1.24.0-2ubuntu7.7.md) | Mar 24, 2026 |
| Linux | libnginx-mod-http-xslt-filter Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.2 | [libnginx-mod-http-xslt-filter 1.28.0-6ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnginx-mod-http-xslt-filter-1.28.0-6ubuntu1.2.md) | Mar 24, 2026 |
| Linux | libnginx-mod-mail Ubuntu 24.04.5 LTS (noble) | 1.24.0-2ubuntu7.7 | [libnginx-mod-mail 1.24.0-2ubuntu7.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnginx-mod-mail-1.24.0-2ubuntu7.7.md) | Mar 24, 2026 |
| Linux | libnginx-mod-mail Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.2 | [libnginx-mod-mail 1.28.0-6ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnginx-mod-mail-1.28.0-6ubuntu1.2.md) | Mar 24, 2026 |
| Linux | libnginx-mod-stream Ubuntu 24.04.5 LTS (noble) | 1.24.0-2ubuntu7.7 | [libnginx-mod-stream 1.24.0-2ubuntu7.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnginx-mod-stream-1.24.0-2ubuntu7.7.md) | Mar 24, 2026 |
| Linux | libnginx-mod-stream Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.2 | [libnginx-mod-stream 1.28.0-6ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnginx-mod-stream-1.28.0-6ubuntu1.2.md) | Mar 24, 2026 |
| Linux | libnginx-mod-stream-geoip Ubuntu 24.04.5 LTS (noble) | 1.24.0-2ubuntu7.7 | [libnginx-mod-stream-geoip 1.24.0-2ubuntu7.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libnginx-mod-stream-geoip-1.24.0-2ubuntu7.7.md) | Mar 24, 2026 |
| Linux | libnginx-mod-stream-geoip Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.2 | [libnginx-mod-stream-geoip 1.28.0-6ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-libnginx-mod-stream-geoip-1.28.0-6ubuntu1.2.md) | Mar 24, 2026 |
| Linux | nginx Debian 14 | 1.28.3-2 | [DEBIAN-CVE-2026-28755](https://patchblox.com/security/data/fix/linux/debian-cve-2026-28755.md) | Mar 24, 2026 |
| Linux | nginx Ubuntu 24.04.5 LTS (noble) | 1.24.0-2ubuntu7.7 | [nginx 1.24.0-2ubuntu7.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-nginx-1.24.0-2ubuntu7.7.md) | Mar 24, 2026 |
| Linux | nginx Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.2 | [nginx 1.28.0-6ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-nginx-1.28.0-6ubuntu1.2.md) | Mar 24, 2026 |
| Linux | nginx amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-all-modules amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-common Ubuntu 24.04.5 LTS (noble) | 1.24.0-2ubuntu7.7 | [nginx-common 1.24.0-2ubuntu7.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-nginx-common-1.24.0-2ubuntu7.7.md) | Mar 24, 2026 |
| Linux | nginx-common Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.2 | [nginx-common 1.28.0-6ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-nginx-common-1.28.0-6ubuntu1.2.md) | Mar 24, 2026 |
| Linux | nginx-core Ubuntu 24.04.5 LTS (noble) | 1.24.0-2ubuntu7.7 | [nginx-core 1.24.0-2ubuntu7.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-nginx-core-1.24.0-2ubuntu7.7.md) | Mar 24, 2026 |
| Linux | nginx-core Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.2 | [nginx-core 1.28.0-6ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-nginx-core-1.28.0-6ubuntu1.2.md) | Mar 24, 2026 |
| Linux | nginx-core amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-core-debuginfo amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-debuginfo amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-debugsource amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-extras Ubuntu 24.04.5 LTS (noble) | 1.24.0-2ubuntu7.7 | [nginx-extras 1.24.0-2ubuntu7.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-nginx-extras-1.24.0-2ubuntu7.7.md) | Mar 24, 2026 |
| Linux | nginx-extras Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.2 | [nginx-extras 1.28.0-6ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-nginx-extras-1.28.0-6ubuntu1.2.md) | Mar 24, 2026 |
| Linux | nginx-filesystem amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-full Ubuntu 24.04.5 LTS (noble) | 1.24.0-2ubuntu7.7 | [nginx-full 1.24.0-2ubuntu7.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-nginx-full-1.24.0-2ubuntu7.7.md) | Mar 24, 2026 |
| Linux | nginx-full Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.2 | [nginx-full 1.28.0-6ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-nginx-full-1.28.0-6ubuntu1.2.md) | Mar 24, 2026 |
| Linux | nginx-light Ubuntu 24.04.5 LTS (noble) | 1.24.0-2ubuntu7.7 | [nginx-light 1.24.0-2ubuntu7.7](https://patchblox.com/security/data/fix/linux/ubuntu-noble-nginx-light-1.24.0-2ubuntu7.7.md) | Mar 24, 2026 |
| Linux | nginx-light Ubuntu 25.10 (questing) | 1.28.0-6ubuntu1.2 | [nginx-light 1.28.0-6ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-nginx-light-1.28.0-6ubuntu1.2.md) | Mar 24, 2026 |
| Linux | nginx-mod-devel amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-mod-http-image-filter amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-mod-http-image-filter-debuginfo amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-mod-http-perl amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-mod-http-perl-debuginfo amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-mod-http-xslt-filter amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-mod-http-xslt-filter-debuginfo amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-mod-mail amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-mod-mail-debuginfo amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-mod-stream amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |
| Linux | nginx-mod-stream-debuginfo amzn 2023 | 1:1.28.3-1.amzn2023.0.1 | [ALAS2023-2026-1540](https://patchblox.com/security/data/fix/linux/alas2023-2026-1540.md) | Apr 13, 2026 |

---

Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.