NGINX ngx_http_charset_module vulnerability_CVE-2026-42934

4.8 / 10

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

Description

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.

Basic Information

ID CVE-2026-42934

Source f5

Published May 13, 2026 at 14:12

Affected Product

Vendor F5

Product NGINX Plus

Version R37

Affected Versions F5 NGINX Plus R36
F5 NGINX Plus R32
F5 NGINX Open Source 0.3.50

CWE Classification

CWE-125

References

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

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