Description
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssi_module module. This vulnerability may exist when the Server-Side Includes (SSI), proxy_pass, and proxy_buffering off directives are configured. With this configuration, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to cause a use-after-free in the NGINX worker process. This issue may lead to limited modification of memory or a restart of the NGINX worker process. Impact: This vulnerability may allow remote attackers to have limited control to modify memory contents or restart the NGINX worker process. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
CVSS breakdown
Affected products
- F5 / NGINX Gateway Fabric1.3.0 – 1.6.2
- F5 / NGINX Ingress Controller3.5.0 – 3.7.2
- F5 / NGINX Ingress Controller2026-lts-r1 – 2026-lts-r4
- F5 / NGINX Ingress Controller4.0.0 – 4.0.0
- F5 / NGINX Ingress Controller4.0.1 – 4.0.1
- F5 / NGINX Open Source0.8.11 – 1.30.4
- F5 / NGINX Open Source1.31.2 – 1.31.3
- 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 PlusR36 – R36 P7
- F5 / NGINX PlusR33 – *
- F5 / NGINX Plus37.0.0.1 – 37.0.3.1
- F5 / NGINX Plusr36 – r36
- F5 / NGINX Plusr36 – r36
- F5 / NGINX Plusr36 – r36
- F5 / waf4.11.0 – 4.16.0