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:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/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:XF5 nginx Gateway Fabric
APPF52.0.0 – 2.6.7 (excl.)1.3.0 – 1.6.2F5 nginx Ingress Controller
APPF54.0.04.0.12026-lts-r1 – 2026-lts-r4 (excl.)3.5.0 – 3.7.25.0.0 – 5.5.3 (excl.)F5 nginx Plus
APPF5r36r33 – r36 (excl.)37.0.0.1 – 37.0.3.1 (excl.)F5 Waf
APPF54.11.0 – 4.16.05.2.0 – 5.8.05.9.0 – 5.13.4 (excl.)
Related vulnerabilities
Heap buffer overflow w NGINX Plus i NGINX Open Source — DoS i możliwy RCE
Use-after-Free w module HTTP/3 QUIC NGINX — możliwość RCE
NGINX Plus/Open Source: heap buffer overflow w modułach HTTP/2 i gRPC
Heap buffer overflow w NGINX w module ngx_http_rewrite_module (RCE)
NGINX heap buffer overflow w module ngx_http_rewrite_module (RCE/restart)