NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssi_module module. This vulnerability may exist when the Server-Side Includes (SSI), proxy_pass, and proxy_buffering off directives are configured. With this configuration, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to cause a heap buffer over-read in the NGINX worker process. This issue may lead to limited modification of memory or a restart of the NGINX worker process.
Impact: This vulnerability may allow remote attackers to have limited control to modify memory contents or restart the NGINX worker process. There is no control plane exposure; this is a data plane issue only.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade nginx-mod-mailUpgrade nginx-all-modulesUpgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-develUpgrade nginx-mod-streamUpgrade nginx-filesystemUpgrade nginx-coreUpgrade nginxUpgrade nginx-mod-http-perlUpgrade nginx-mod-http-image-filter | Oct 11, 2026 | Aug 24, 2026 |
| Alpine Linux | — | Upgrade nginx | Jul 21, 2026 | Jul 15, 2026 |
| Amazon Linux Ami 2 | — | Upgrade nginx-mod-mailUpgrade nginx-all-modulesUpgrade nginx-filesystemUpgrade nginxUpgrade nginx-mod-http-xslt-filterUpgrade nginx-coreUpgrade nginx-mod-http-geoipUpgrade nginx-mod-streamUpgrade nginx-mod-develUpgrade nginx-debuginfoUpgrade nginx-mod-http-perlUpgrade nginx-mod-http-image-filter | Aug 5, 2026 | Aug 5, 2026 |
| Amazon_linux_2023 | — | Upgrade nginx-filesystemUpgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-streamUpgrade nginx-core-debuginfoUpgrade nginx-debuginfoUpgrade nginx-coreUpgrade nginx-debugsourceUpgrade nginx-mod-mail-debuginfoUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-mod-http-perl-debuginfoUpgrade nginx-all-modulesUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx-mod-stream-debuginfoUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-mailUpgrade nginx-mod-http-perlUpgrade nginx-mod-develUpgrade nginx | Aug 10, 2026 | Jul 15, 2026 |
| Debian | — | Upgrade nginx | Sep 21, 2026 | Jul 15, 2026 |
| Freebsd | — | Upgrade nginxUpgrade angieUpgrade nginx-devel | Aug 3, 2026 | Aug 3, 2026 |
| Gentoo Linux | — | Upgrade www-servers/nginx. | Aug 17, 2026 | Aug 17, 2026 |
| Nginx | — | Upgrade to nginx version 1.30.4Upgrade to nginx version 1.31.3 | Jul 16, 2026 | Jul 15, 2026 |
| Redhat_linux | — | Upgrade nginx-coreUpgrade nginx-mod-http-perlUpgrade nginx-mod-http-perl-debuginfoUpgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-stream-debuginfoUpgrade nginx-mod-streamUpgrade nginx-debugsourceUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-mod-http-image-filterUpgrade nginx-debuginfoUpgrade nginx-mod-mail-debuginfoUpgrade nginxUpgrade nginx-core-debuginfoUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx-filesystemUpgrade nginx-mod-mailUpgrade nginx-all-modulesUpgrade nginx-mod-devel | Jul 30, 2026 | Jul 15, 2026 |
| Rocky_linux | — | Upgrade nginx-mod-http-perlUpgrade nginx-core-debuginfoUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx-mod-develUpgrade nginxUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-http-perl-debuginfoUpgrade nginx-mod-mailUpgrade nginx-coreUpgrade nginx-mod-http-xslt-filterUpgrade nginx-debugsourceUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-mod-stream-debuginfoUpgrade nginx-debuginfoUpgrade nginx-mod-mail-debuginfoUpgrade nginx-mod-stream | Aug 26, 2026 | Aug 25, 2026 |
| Ubuntu | — | Upgrade nginx-lightUpgrade nginx-extrasUpgrade nginxUpgrade nginx-fullUpgrade nginx-core | Jul 21, 2026 | Jul 20, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 13, 2026 | Jul 15, 2026 |
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