CVE-2026-27654CWE-122

NGINX ngx_http_dav_module vulnerability

High · published March 24, 2026

CVSS v4.0
8.8
EPSS
26%
Percentile
98.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.8 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
EPSS
0.25942 · 98.0th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-03-24T14:13Z
EPSS history
Timeline
  • 03 OCT 03:42Z
    EPSS moved 2% → 25%
    epss
  • 25 SEP 03:25Z
    EPSS moved 25% → 2%
    epss
  • 24 MAR 14:13Z
    NGINX ngx_http_dav_module vulnerability
    cvelistv5