PT-2026-27430 · F5 · Nginx Open Source+1

Published 2026-03-24 · Updated 2026-03-24 · CVE-2026-27654

Mitre

CVSS v3.1

8.2

High

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

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.

Fix

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-27654

Affected Products

Nginx Open Source

Nginx Plus

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-27654 · Security Note
• https://my.f5.com/manage/s/article/K000160382 · Vendor Advisory