NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_slice_module module. When the slice directive and unnamed regex captures are configured or when a background cache update happens, unauthenticated attackers can send requests that may cause uninitialized memory access in the NGINX worker process, leading to limited disclosure of memory or a restart.
Impact: This vulnerability may allow remote, unauthenticated attackers to have limited control to disclose memory contents or restart the NGINX worker process. There is no control plane exposure; this is a data plane issue only. Note: The ngx_http_slice_module module is not enabled by default; it's enabled with the --with-http_slice_module configuration parameter.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
CVSS Details
- CVSS 4.0 Base Score: 8.8 (HIGH)
- CVSS 4.0 Vector: (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
- CVSS 3.1 Base Score: 8.2
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade nginx | Jul 21, 2026 | Jul 15, 2026 |
| Amazon Linux Ami 2 | — | Upgrade nginx-debuginfoUpgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-http-perlUpgrade nginx-mod-streamUpgrade nginx-coreUpgrade nginx-filesystemUpgrade nginx-mod-develUpgrade nginx-all-modulesUpgrade nginx-mod-http-geoipUpgrade nginx-mod-mailUpgrade nginxUpgrade nginx-mod-http-image-filter | Aug 5, 2026 | Aug 5, 2026 |
| Amazon_linux_2023 | — | Upgrade nginx-mod-http-perl-debuginfoUpgrade nginx-mod-develUpgrade nginxUpgrade nginx-mod-mailUpgrade nginx-core-debuginfoUpgrade nginx-filesystemUpgrade nginx-all-modulesUpgrade nginx-mod-mail-debuginfoUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-coreUpgrade nginx-mod-http-xslt-filterUpgrade nginx-debugsourceUpgrade nginx-mod-http-perlUpgrade nginx-mod-streamUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-stream-debuginfoUpgrade nginx-debuginfo | Aug 10, 2026 | Jul 15, 2026 |
| Debian | — | Upgrade nginx | Sep 21, 2026 | Jul 15, 2026 |
| Freebsd | — | Upgrade angieUpgrade nginx-develUpgrade nginx | 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-mod-http-image-filterUpgrade nginx-debuginfoUpgrade nginx-mod-streamUpgrade nginx-mod-http-perlUpgrade nginx-coreUpgrade nginx-mod-mail-debuginfoUpgrade nginx-mod-stream-debuginfoUpgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-debugsourceUpgrade nginx-all-modulesUpgrade nginx-mod-develUpgrade nginxUpgrade nginx-mod-http-perl-debuginfoUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx-core-debuginfoUpgrade nginx-mod-mailUpgrade nginx-filesystem | Jul 30, 2026 | Jul 15, 2026 |
| Rocky_linux | — | Upgrade nginx-coreUpgrade nginxUpgrade nginx-mod-mailUpgrade nginx-mod-mail-debuginfoUpgrade nginx-core-debuginfoUpgrade nginx-mod-http-perl-debuginfoUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-stream-debuginfoUpgrade nginx-mod-develUpgrade nginx-mod-streamUpgrade nginx-mod-http-perlUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-debugsourceUpgrade nginx-debuginfoUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx-mod-http-xslt-filter | Aug 26, 2026 | Aug 25, 2026 |
| Ubuntu | — | Upgrade nginx-coreUpgrade nginx-fullUpgrade nginx-extrasUpgrade nginxUpgrade nginx-light | 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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