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-mod-http-geoipUpgrade nginx-mod-develUpgrade nginx-all-modulesUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-mailUpgrade nginxUpgrade nginx-mod-http-perlUpgrade nginx-coreUpgrade nginx-mod-http-xslt-filterUpgrade nginx-debuginfoUpgrade nginx-filesystemUpgrade nginx-mod-stream | Aug 5, 2026 | Aug 5, 2026 |
| Amazon_linux_2023 | — | Upgrade nginx-mod-develUpgrade nginx-all-modulesUpgrade nginx-mod-http-perl-debuginfoUpgrade nginx-core-debuginfoUpgrade nginxUpgrade nginx-filesystemUpgrade nginx-mod-mailUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-mod-streamUpgrade nginx-mod-stream-debuginfoUpgrade nginx-debuginfoUpgrade nginx-mod-http-perlUpgrade nginx-mod-mail-debuginfoUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx-coreUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-http-xslt-filterUpgrade nginx-debugsource | Aug 10, 2026 | Jul 15, 2026 |
| Freebsd | — | Upgrade angieUpgrade nginxUpgrade 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 1.31.3Upgrade to nginx version 1.30.4 | Jul 16, 2026 | Jul 15, 2026 |
| Redhat_linux | — | Upgrade nginx-mod-stream-debuginfoUpgrade nginx-mod-mail-debuginfoUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-http-perlUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-debuginfoUpgrade nginx-coreUpgrade nginx-mod-streamUpgrade nginx-debugsourceUpgrade nginx-mod-http-xslt-filterUpgrade nginx-filesystemUpgrade nginx-mod-http-perl-debuginfoUpgrade nginx-all-modulesUpgrade nginx-mod-develUpgrade nginx-core-debuginfoUpgrade nginx-mod-mailUpgrade nginxUpgrade nginx-mod-http-xslt-filter-debuginfo | Jul 30, 2026 | Jul 15, 2026 |
| Rocky_linux | — | Upgrade nginx-mod-http-xslt-filterUpgrade nginx-mod-http-image-filterUpgrade nginx-mod-develUpgrade nginx-debuginfoUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-debugsourceUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx-mod-http-perl-debuginfoUpgrade nginx-mod-stream-debuginfoUpgrade nginx-mod-streamUpgrade nginx-mod-http-perlUpgrade nginx-mod-mail-debuginfoUpgrade nginx-mod-mailUpgrade nginx-core-debuginfoUpgrade nginx-coreUpgrade nginx | Aug 26, 2026 | Aug 25, 2026 |
| Ubuntu | — | Upgrade nginx-lightUpgrade nginxUpgrade nginx-coreUpgrade nginx-extrasUpgrade nginx-full | 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 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub