NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When content is served or proxied through a location block with both source_charset utf-8; and a charset directive (for example, charset koi8-r;) configured, remote, unauthenticated attackers can send requests (in conjunction with conditions beyond their control) to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade nginx | Jun 23, 2026 | Jun 17, 2026 |
| Amazon Linux Ami 2 | — | Upgrade nginx-mod-mailUpgrade nginx-filesystemUpgrade nginx-mod-develUpgrade nginx-debuginfoUpgrade nginxUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-http-geoipUpgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-streamUpgrade nginx-mod-http-perlUpgrade nginx-all-modulesUpgrade nginx-core | Jul 8, 2026 | Jul 8, 2026 |
| Amazon_linux_2023 | — | Upgrade nginx-mod-http-perl-debuginfoUpgrade nginx-debugsourceUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-coreUpgrade nginx-all-modulesUpgrade nginx-mod-mailUpgrade nginx-mod-develUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx-mod-stream-debuginfoUpgrade nginx-mod-mail-debuginfoUpgrade nginxUpgrade nginx-debuginfoUpgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-http-perlUpgrade nginx-filesystemUpgrade nginx-mod-streamUpgrade nginx-core-debuginfoUpgrade nginx-mod-http-image-filter | Jul 8, 2026 | Jun 17, 2026 |
| Debian | — | Upgrade nginx | Jul 1, 2026 | Jul 1, 2026 |
| Freebsd | — | Upgrade nginx-develUpgrade nginx | Jun 18, 2026 | Jun 17, 2026 |
| Gentoo Linux | — | Upgrade www-servers/nginx. | Aug 17, 2026 | Aug 17, 2026 |
| Nginx | — | Upgrade to nginx version 1.31.2Upgrade to nginx version 1.30.3 | Jun 18, 2026 | Jun 17, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Jun 17, 2026 |
| Ubuntu | — | Upgrade nginx-coreUpgrade nginx-lightUpgrade nginx-fullUpgrade nginx-extrasUpgrade nginx | Jun 22, 2026 | Jun 19, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 13, 2026 | Jun 17, 2026 |
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