CVE-2026-42934
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.
- Score
- CVSS 4.0 6.3 Medium
- Status
- Analyzed - f5sirt@f5.com
- Published
- 2026-05-13
- Last modified
- 2026-10-26
- Weaknesses
- CWE-125
Affected products
- Dos (F5)
- Nginx Gateway Fabric (F5)
- Nginx Ingress Controller (F5)
- Nginx Instance Manager (F5)
- Nginx Open Source (F5)
- Nginx Plus (F5)
- Waf (F5)
References
- https://my.f5.com/manage/s/article/K000161028
