CVE-2026-40701
Fixed in a distro release EPSS <1%CVSS 4.8
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssl_module module when the ssl_verify_client directive is set to "on" or "optional," and the ssl_ocsp directive is set to "on" or the leaf parameters are configured with a resolver. With this configuration, an unauthenticated attacker can send requests along with conditions beyond its control that may cause a heap-use-after-free error in the NGINX worker process. This vulnerability may result in limited modification of data or the NGINX worker process restarting. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Products: F5 NGINX Plus, F5 NGINX Open Source
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.21 | nginx | 1.26.3-r1 |
| Alpine 3.22 | nginx | 1.28.3-r1 |
| Alpine 3.23 | nginx | 1.28.3-r1 |
| Amazon Linux 2023 | nginx | 1:1.30.1-1.amzn2023.0.1 |
| Amazon Linux 2023 | nginx-all-modules | 1:1.30.1-1.amzn2023.0.1 |
| Amazon Linux 2023 | nginx-core | 1:1.30.1-1.amzn2023.0.1 |
| Amazon Linux 2023 | nginx-filesystem | 1:1.30.1-1.amzn2023.0.1 |
| Amazon Linux 2023 | nginx-mod-devel | 1:1.30.1-1.amzn2023.0.1 |
| Amazon Linux 2023 | nginx-mod-http-image-filter | 1:1.30.1-1.amzn2023.0.1 |
| Amazon Linux 2023 | nginx-mod-http-perl | 1:1.30.1-1.amzn2023.0.1 |
| Amazon Linux 2023 | nginx-mod-http-xslt-filter | 1:1.30.1-1.amzn2023.0.1 |
| Amazon Linux 2023 | nginx-mod-mail | 1:1.30.1-1.amzn2023.0.1 |
| Amazon Linux 2023 | nginx-mod-stream | 1:1.30.1-1.amzn2023.0.1 |
| Chainguard | nginx-mainline | 1.31.0-r0 |
| Chainguard | nginx-stable | 1.30.1-r0 |
| Debian 12 | nginx | 1.22.1-9+deb12u7 |
| Debian 13 | nginx | 1.26.3-3+deb13u5 |
| Debian 14 | nginx | 1.30.0-4 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | nginx | 1.21.5-150400.3.20.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | nginx | 1.21.5-150400.3.20.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | nginx | 1.21.5-150400.3.20.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | nginx | 1.21.5-150400.3.20.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | nginx | 1.21.5-150400.3.20.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | nginx | 1.21.5-150400.3.20.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | nginx | 1.21.5-150400.3.20.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | nginx | 1.21.5-150400.3.20.1 |
| Ubuntu 22.04 LTS | nginx | 1.18.0-6ubuntu14.12 |
| Ubuntu 24.04 LTS | nginx | 1.24.0-2ubuntu7.9 |
| Ubuntu 25.10 | nginx | 1.28.0-6ubuntu1.4 |
| Ubuntu 26.04 LTS | nginx | 1.28.3-2ubuntu1.2 |
| Ubuntu Pro 14.04 LTS | nginx | 1.4.6-1ubuntu3.9+esm6 |
| Ubuntu Pro 16.04 LTS | nginx | 1.10.3-0ubuntu0.16.04.5+esm7 |
| Ubuntu Pro 18.04 LTS | nginx | 1.14.0-0ubuntu1.11+esm2 |
| Ubuntu Pro 20.04 LTS | nginx | 1.18.0-0ubuntu1.7+esm1 |
| Wolfi | nginx-mainline | 1.31.0-r0 |
| Wolfi | nginx-stable | 1.30.1-r0 |
| openSUSE Tumbleweed | nginx | 1.31.0-1.1 |