NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When charset, source_charset, and charset_map and proxy_pass with disabled buffering ("off") directives are configured, unauthenticated attackers can send requests that with conditions beyond the attackers' 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 | May 15, 2026 | May 13, 2026 |
| Amazon Linux Ami 2 | — | Upgrade nginx-debuginfoUpgrade nginx-mod-http-geoipUpgrade nginx-filesystemUpgrade nginx-mod-develUpgrade nginx-mod-mailUpgrade nginx-all-modulesUpgrade nginx-mod-streamUpgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-http-image-filterUpgrade nginx-coreUpgrade nginxUpgrade nginx-mod-http-perl | Jun 8, 2026 | Jun 8, 2026 |
| Amazon_linux_2023 | — | Upgrade nginx-mod-develUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-filesystemUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-mail-debuginfoUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx-core-debuginfoUpgrade nginx-mod-http-perlUpgrade nginx-coreUpgrade nginx-mod-mailUpgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-streamUpgrade nginx-debugsourceUpgrade nginxUpgrade nginx-all-modulesUpgrade nginx-mod-stream-debuginfoUpgrade nginx-debuginfoUpgrade nginx-mod-http-perl-debuginfo | May 28, 2026 | May 13, 2026 |
| Debian | — | Upgrade nginx | May 17, 2026 | May 17, 2026 |
| Freebsd | — | Upgrade nginx-develUpgrade nginx | May 21, 2026 | May 19, 2026 |
| Gentoo Linux | — | Upgrade www-servers/nginx. | Aug 17, 2026 | Aug 17, 2026 |
| Nginx | — | Upgrade to nginx version 1.31.0Upgrade to nginx version 1.30.1 | May 14, 2026 | May 13, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | May 13, 2026 |
| Ubuntu | — | Upgrade libnginx-mod-http-cache-purge (Ubuntu Pro)Upgrade nginxUpgrade nginx-fullUpgrade libnginx-mod-http-uploadprogress (Ubuntu Pro)Upgrade libnginx-mod-http-lua (Ubuntu Pro)Upgrade nginx-extras (Ubuntu Pro)Upgrade libnginx-mod-http-dav-ext (Ubuntu Pro)Upgrade nginx-common (Ubuntu Pro)Upgrade libnginx-mod-http-upstream-fair (Ubuntu Pro)Upgrade libnginx-mod-http-fancyindex (Ubuntu Pro)Upgrade libnginx-mod-rtmp (Ubuntu Pro)Upgrade libnginx-mod-http-headers-more-filter (Ubuntu Pro)Upgrade libnginx-mod-http-subs-filter (Ubuntu Pro)Upgrade nginx-extrasUpgrade nginx-core (Ubuntu Pro)Upgrade libnginx-mod-http-auth-pam (Ubuntu Pro)Upgrade libnginx-mod-http-image-filter (Ubuntu Pro)Upgrade libnginx-mod-http-ndk (Ubuntu Pro)Upgrade libnginx-mod-mail (Ubuntu Pro)Upgrade nginx-full (Ubuntu Pro)Upgrade nginx (Ubuntu Pro)Upgrade libnginx-mod-http-perl (Ubuntu Pro)Upgrade nginx-lightUpgrade nginx-light (Ubuntu Pro)Upgrade nginx-naxsi (Ubuntu Pro)Upgrade libnginx-mod-stream (Ubuntu Pro)Upgrade libnginx-mod-http-xslt-filter (Ubuntu Pro)Upgrade libnginx-mod-http-echo (Ubuntu Pro)Upgrade nginx-coreUpgrade libnginx-mod-nchan (Ubuntu Pro)Upgrade libnginx-mod-http-geoip (Ubuntu Pro) | Jun 2, 2026 | Jun 1, 2026 |
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