CVE-2026-42934 — NGINX ngx_http_charset_module vulnerability

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
F5 / NGINX Plus	unaffected R37 before *; affected R36 before R36 P4; affected R32 before R32 P6
F5 / NGINX Open Source	unaffected 1.31.0 before *; affected 0.3.50 before 1.30.1

CWE

CWE-125

References

https://my.f5.com/manage/s/article/K000161028

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.