CVE-2026-42934

published 2026-05-13

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…

medium 6.3 CVSS 4.0

AV N AC L AT P PR N UI N VC L VI N VA L 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 X

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

9 ranges

Vendor	Product	Version range	Fixed in
f5	nginx_open_source	>= 0.3.50 < 1.30.1	1.30.1
f5	nginx_plus	—	—
f5	nginx_plus	—	—
f5	nginx_plus	>= R32 < R32 P6	R32 P6
f5	nginx_plus	>= R36 < R36 P4	R36 P4
insights-proxy	insights-proxy-container-rhel9	—	—
nginx_1.24	nginx	—	—
nginx_1.26	nginx	—	—
ubuntu	nginx	—	—

CWE-125 CWE-126