nginx 0.5.13 < 1.28.3 / 1.29.x < 1.29.7 Buffer Overflow in ngx_http_dav_module

high Nessus Plugin ID 306674

Synopsis

The remote web server is affected by a vulnerability.

Description

The installed version of nginx is 0.5.13 prior to 1.28.3, or 1.29.x prior to 1.29.7. It is, therefore, affected by the following issue :

- NGINX Open Source and NGINX Plus have a vulnerability in the ngx_http_dav_module module that might allow an attacker to trigger a buffer overflow to the NGINX worker process; this vulnerability may result in termination of the NGINX worker process or modification of source or destination file names outside the document root. This issue affects NGINX Open Source and NGINX Plus when the configuration file uses DAV module MOVE or COPY methods, prefix location (nonregular expression location configuration), and alias directives. The integrity impact is constrained because the NGINX worker process user has low privileges and does not have access to the entire system. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated. (CVE-2026-27654)

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 1.28.3 / 1.29.7 or later.

Plugin Details

Severity: High

ID: 306674

File Name: nginx_CVE-2026-27654.nasl

Version: 1.1

Type: Combined

Agent: unix

Family: Web Servers

Published: 4/16/2026

Updated: 4/16/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

CVSS v2

Risk Factor: High

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:C

CVSS Score Source: CVE-2026-27654

CVSS v3

Risk Factor: High

Base Score: 8.2

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Vulnerability Information

CPE: cpe:/a:nginx:nginx

Required KB Items: Settings/ParanoidReport, installed_sw/nginx

Patch Publication Date: 3/24/2026

Vulnerability Publication Date: 3/24/2026

Reference Information

CVE: CVE-2026-27654

Detections

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