Detections
Analytics
nginx 0.3.50 < 1.30.3 / 1.31.x < 1.31.2 Buffer Overread in ngx_http_charset_module
medium Nessus Plugin ID 321915
Synopsis
The remote web server is affected by a vulnerability.Description
The installed version of nginx is 0.3.50 prior to 1.30.3, or 1.31.x prior to 1.31.2. It is, therefore, affected by the following issue :- NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module module. When content is served or proxied through a location block with both source_charset utf-8; and a charset directive (for example, charset koi8-r;) configured, remote, unauthenticated attackers can send requests (in conjunction with conditions beyond their 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. (CVE-2026-48142)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to nginx 1.30.3 / 1.31.2 or later.See Also
Plugin Details
Severity: Medium
ID: 321915
File Name: nginx_CVE-2026-48142.nasl
Version: 1.1
Type: Combined
Agent: unix
Family: Web Servers
Published: 6/22/2026
Updated: 6/22/2026
Configuration: Enable paranoid mode
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.0
CVSS v2
Risk Factor: Medium
Base Score: 4
Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:P
CVSS Score Source: CVE-2026-48142
CVSS v3
Risk Factor: Medium
Base Score: 4.8
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Vulnerability Information
CPE: cpe:/a:nginx:nginx
Required KB Items: Settings/ParanoidReport, installed_sw/nginx
Patch Publication Date: 6/17/2026
Vulnerability Publication Date: 6/17/2026
Reference Information
CVE: CVE-2026-48142
IAVA: 2026-A-0601