NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When charset, source_charset, and charset_map and proxy_pass with disabled buffering ("off") directives are configured, unauthenticated attackers can send requests that with conditions beyond the attackers' control to cause a heap buffer over-read in the NGINX worker process, leading to limited disclosure of memory or a restart. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Fix
Patch, vendor advisory and mitigation references on NVD 1
- https://my.f5.com/manage/s/article/K000161028 Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.3 · f5NVD modified 2026-10-26 14:10
Affected (CPE criteria) 8
cpe:2.3:a:f5:dos:*:*:*:*:*:nginx:*:*cpe:2.3:a:f5:dos:4.8.0:*:*:*:*:nginx:*:*cpe:2.3:a:f5:nginx_gateway_fabric:*:*:*:*:*:*:*:*cpe:2.3:a:f5:nginx_ingress_controller:*:*:*:*:*:*:*:*cpe:2.3:a:f5:nginx_instance_manager:*:*:*:*:*:*:*:*cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:*cpe:2.3:a:f5:nginx_plus:*:*:*:*:*:*:*:*cpe:2.3:a:f5:waf:*:*:*:*:*:nginx:*:*
References 1
- https://my.f5.com/manage/s/article/K000161028 Mitigation, Vendor Advisory