High8.1Red Hat Linux

High [CVE-2026-9256] code execution and denial of service

This high-severity Red Hat Linux advisory covers CVE-2026-9256 affecting NGINX Plus, NGINX Open Source, Red Hat Enterprise Linux 10.

CVE-2026-9256 Published May 22, 2026

CVE-2026-9256

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

code execution and denial of service. Red Hat rates this important (CVSS 8.1).

Weakness: CWE-122. Affected package(s): nginx, nginx:1.26, nginx-main, nginx:1.24, discovery/discovery-ui-rhel9:1782756541.

Resolved in Red Hat advisory RHSA-2026:29874 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: NGINX Plus; NGINX Open Source; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; and 5 more.

Affected versions

nginx-2:1.20.1-28.el9_8.3
nginx:1.26-9080020260609152155.9
nginx-main-1.30.2-1.hum1
nginx:1.24-9080020260610161820.9
discovery/discovery-ui-rhel9:1782756541
nginx-2:1.26.3-6.el10_2.4
nginx:1.24-8100020260611094050.489197e6

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

RHSA-2026:29874

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:29874 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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