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CVE-2026-60005

nginx: NGINX: Memory disclosure and denial of service in ngx_http_slice_module

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Severity

Important

Red Hat Product Security

8.2

CVSS 3.1

Review impact separately from score.

Published · July 16, 2026

Updated · November 2, 2026

Description

A vulnerability in the NGINX ngx_http_slice_module allows remote, unauthenticated attackers to access uninitialized memory via crafted requests. If configured with unnamed regex captures or background cache updates, this flaw can result in limited memory disclosure or a denial-of-service crash.

Statement

Important: This vulnerability in NGINX's ngx_http_slice_module could lead to memory disclosure or denial of service. The impact on Red Hat products is reduced because the ngx_http_slice_module is not enabled by default. Exploitation requires explicit configuration of the module with the slice directive and unnamed regex captures, or during a background cache update, limiting exposure in typical deployments.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

To mitigate this issue, disable the ngx_http_slice_module entirely if it is not required. If the module must be used, avoid unnamed regex captures with the slice directive and explicitly disable proxy_cache_background_update. Reload or restart the NGINX service to apply these changes. Please note this may cause a brief service interruption.

CVSS / CWE

CVSS 3.1 · 8.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

CWE-824 · Access of Uninitialized Pointer