Description
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 breakdown
Affected products
- f5 / NGINX App Protect WAF4.11.0 – 4.16.0
- f5 / nginx_gateway_fabric1.3.0 – 1.6.2
- f5 / nginx_ingress_controller3.5.0 – 3.7.2
- f5 / nginx_ingress_controller4.0.0 – 4.0.0
- f5 / nginx_ingress_controller4.0.1 – 4.0.1
- f5 / nginx_ingress_controller3.5.0 – 3.7.2
- f5 / nginx_ingress_controller4.0.0 – 4.0.0
- f5 / nginx_ingress_controller2026-lts-r1 – 2026-lts-r4
- f5 / nginx_ingress_controller4.0.1 – 4.0.1
- f5 / nginx_instance_manager2.17.0 – 2.22.2
- f5 / nginx_open_source1.31.2 – 1.31.3
- f5 / nginx_open_source1.30.0 – 1.30.4
- f5 / nginx_open_source1.31.2 – 1.31.2
- f5 / nginx_open_source1.15.8 – 1.30.4
- f5 / nginx_plusr36 – r36
- f5 / nginx_plusR36 – R36 P7
- f5 / nginx_plusR33 – *
- f5 / nginx_plus37.0.0.1 – 37.0.3.1
- f5 / nginx_plus37.0.0 – 37.0.0
- f5 / nginx_plusr36 – r36
- f5 / nginx_plusr36 – r36
- f5 / nginx_plusr36 – r36
- f5 / nginx_plusr36 – r36
- f5 / nginx_plusr36 – r36
- f5 / nginx_plusr36 – r36
- f5 / nginx_plusr36 – r36
- f5 / nginx_plus37.0.0.1 – 37.0.3.1
- f5 / nginx_plus37.0.0.1 – 37.0.3.1
- f5 / nginx_plusr33 – r36
- f5 / nginx_plusr36 – r36
- f5 / nginx_plusr36 – r36
- f5 / nginx_plusr36 – r36
- f5 / nginx_plusr36 – r36
- f5 / nginx_plusr36 – r36
- f5 / nginx_plusr36 – r36
- f5 / waf5.9.0 – 5.13.4