Use of uninitialized resource in NGINX Plus and NGINX Open Source - CVE-2026-60005
Published: July 16, 2026
Vulnerability identifier: #VU137846
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-60005
CWE-ID: CWE-908
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: F5 Networks
Affected software:
NGINX Plus
NGINX Open Source
NGINX Plus
NGINX Open Source
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose limited memory contents or cause a denial of service.
The vulnerability exists due to use of an uninitialized resource in ngx_http_slice_module when handling requests with the slice directive and unnamed regex captures configured or during a background cache update. A remote attacker can send crafted requests to disclose limited memory contents or cause a denial of service.
The issue affects the NGINX worker process and is limited to the data plane. The module is not enabled by default and must be built with the --with-http_slice_module configuration parameter.
How to mitigate CVE-2026-60005
Install security update from vendor's website.