CVE-2025-53859
Fixed in a distro release EPSS <1%CVSS 3.7
NGINX Open Source and NGINX Plus have a vulnerability in the ngx_mail_smtp_module that might allow an unauthenticated attacker to over-read NGINX SMTP authentication process memory; as a result, the server side may leak arbitrary bytes sent in a request to the authentication server. This issue happens during the NGINX SMTP authentication process and requires the attacker to make preparations against the target system to extract the leaked data. The issue affects NGINX only if (1) it is built with the ngx_mail_smtp_module, (2) the smtp_auth directive is configured with method "none," and (3) the authentication server returns the "Auth-Wait" response header. 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 3.22 | nginx | 1.28.2-r0 |
| Alpine 3.23 | nginx | 1.28.2-r0 |
| Alpine 3.24 | nginx | 1.28.2-r0 |
| Amazon Linux 2023 | nginx | 1:1.28.0-1.amzn2023.0.2 |
| Amazon Linux 2023 | nginx-all-modules | 1:1.28.0-1.amzn2023.0.2 |
| Amazon Linux 2023 | nginx-core | 1:1.28.0-1.amzn2023.0.2 |
| Amazon Linux 2023 | nginx-filesystem | 1:1.28.0-1.amzn2023.0.2 |
| Amazon Linux 2023 | nginx-mod-devel | 1:1.28.0-1.amzn2023.0.2 |
| Amazon Linux 2023 | nginx-mod-http-image-filter | 1:1.28.0-1.amzn2023.0.2 |
| Amazon Linux 2023 | nginx-mod-http-perl | 1:1.28.0-1.amzn2023.0.2 |
| Amazon Linux 2023 | nginx-mod-http-xslt-filter | 1:1.28.0-1.amzn2023.0.2 |
| Amazon Linux 2023 | nginx-mod-mail | 1:1.28.0-1.amzn2023.0.2 |
| Amazon Linux 2023 | nginx-mod-stream | 1:1.28.0-1.amzn2023.0.2 |
| Chainguard | nginx-stable | 1.30.0-r0 |
| Chainguard | nginx-stable-config | 1.30.0-r0 |
| Chainguard | nginx-stable-config-compat | 1.30.0-r0 |
| Chainguard | nginx-stable-fastcgi-params | 1.30.0-r0 |
| Chainguard | nginx-stable-mime-types | 1.30.0-r0 |
| Chainguard | nginx-stable-mod-http_geoip | 1.30.0-r0 |
| Chainguard | nginx-stable-mod-http_image_filter | 1.30.0-r0 |
| Chainguard | nginx-stable-mod-http_perl | 1.30.0-r0 |
| Chainguard | nginx-stable-mod-http_xslt_filter | 1.30.0-r0 |
| Chainguard | nginx-stable-mod-mail | 1.30.0-r0 |
| Chainguard | nginx-stable-mod-stream | 1.30.0-r0 |
| Chainguard | nginx-stable-mod-stream_geoip | 1.30.0-r0 |
| Chainguard | nginx-stable-package-config | 1.30.0-r0 |
| Chainguard | nginx-stable-scgi-params | 1.30.0-r0 |
| Chainguard | nginx-stable-src | 1.30.0-r0 |
| Chainguard | nginx-stable-syslog-config | 1.30.0-r0 |
| Chainguard | nginx-stable-uwsgi-params | 1.30.0-r0 |
| Debian 12 | nginx | 1.22.1-9+deb12u3 |
| Debian 13 | nginx | 1.26.3-3+deb13u1 |
| Debian 14 | nginx | 1.28.0-3 |
| Red Hat hummingbird 1 | nginx | 0:1.30.0-1.hum1 |
| Red Hat hummingbird 1 | nginx-all-modules | 0:1.30.0-1.hum1 |
| Red Hat hummingbird 1 | nginx-core | 0:1.30.0-1.hum1 |
| Red Hat hummingbird 1 | nginx-filesystem | 0:1.30.0-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-devel | 0:1.30.0-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-http-geoip | 0:1.30.0-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-http-image-filter | 0:1.30.0-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-http-perl | 0:1.30.0-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-http-xslt-filter | 0:1.30.0-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-mail | 0:1.30.0-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-stream | 0:1.30.0-1.hum1 |
| Red Hat hummingbird 1 | nginx-mod-stream-geoip | 0:1.30.0-1.hum1 |
| Ubuntu 22.04 LTS | nginx | 1.18.0-6ubuntu14.7 |
| Ubuntu 24.04 LTS | nginx | 1.24.0-2ubuntu7.5 |
| Ubuntu 25.10 | nginx | 1.26.3-3ubuntu3 |
| 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-stable | 1.30.0-r0 |
| Wolfi | nginx-stable-config | 1.30.0-r0 |
| Wolfi | nginx-stable-config-compat | 1.30.0-r0 |
| Wolfi | nginx-stable-fastcgi-params | 1.30.0-r0 |
| Wolfi | nginx-stable-mime-types | 1.30.0-r0 |
| Wolfi | nginx-stable-mod-http_geoip | 1.30.0-r0 |
| Wolfi | nginx-stable-mod-http_image_filter | 1.30.0-r0 |
| Wolfi | nginx-stable-mod-http_perl | 1.30.0-r0 |
| Wolfi | nginx-stable-mod-http_xslt_filter | 1.30.0-r0 |
| Wolfi | nginx-stable-mod-mail | 1.30.0-r0 |
| Wolfi | nginx-stable-mod-stream | 1.30.0-r0 |
| Wolfi | nginx-stable-mod-stream_geoip | 1.30.0-r0 |
| Wolfi | nginx-stable-package-config | 1.30.0-r0 |
| Wolfi | nginx-stable-scgi-params | 1.30.0-r0 |
| Wolfi | nginx-stable-src | 1.30.0-r0 |
| Wolfi | nginx-stable-syslog-config | 1.30.0-r0 |
| Wolfi | nginx-stable-uwsgi-params | 1.30.0-r0 |
| openSUSE Tumbleweed | nginx | 1.29.1-1.1 |