RHSA-2026:18029: Critical: nginx security update

Published May 18, 2026
·
Updated

Critical: nginx security update

Other sources

nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage. Security Fix(es): nginx: NGINX: Arbitrary Code Execution Vulnerability (CVE-2026-42945) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

— Red Hat

Affected Software

74 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for ARM 64
Red Hat Red Hat CodeReady Linux Builder for Power, little endian
Red Hat Red Hat CodeReady Linux Builder for x86_64
Red Hat Red Hat Enterprise Linux for Power, little endian
Red Hat Red Hat Enterprise Linux for x86_64
Red Hat Red Hat Enterprise Linux for IBM z Systems
Red Hat Red Hat CodeReady Linux Builder for ARM 64
Red Hat Red Hat CodeReady Linux Builder for IBM z Systems
redhat/nginx<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-all-modules<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-core<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-core-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-debugsource<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-filesystem<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-image-filter<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-perl<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-perl-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-xslt-filter<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-mail<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-mail-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-stream<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-stream-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-core<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-core-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-debugsource<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-image-filter<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-perl<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-perl-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-xslt-filter<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-mail<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-mail-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-stream<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-stream-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-core<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-core-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-debugsource<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-image-filter<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-perl<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-perl-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-xslt-filter<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-mail<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-mail-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-stream<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-stream-debuginfo<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-core<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-core-debuginfo<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-debuginfo<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-debugsource<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-mod-http-image-filter<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-mod-http-perl<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-mod-http-perl-debuginfo<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-mod-http-xslt-filter<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-mod-mail<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-mod-mail-debuginfo<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-mod-stream<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-mod-stream-debuginfo<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-mod-devel<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-devel<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3
redhat/nginx-mod-devel<1.20.1-24.el9_7.3.aa
1.20.1-24.el9_7.3.aa
redhat/nginx-mod-devel<1.20.1-24.el9_7.3
1.20.1-24.el9_7.3

Remediation

Event History

May 18, 2026
Advisory Published
via Red Hat·08:33 AM
Data Sourced
via Red Hat·08:33 AM
DescriptionSeverityAffected Software
Jun 5, 2026
Advisory Published
via Red Hat·09:44 AM
Data Sourced
via Red Hat·09:44 AM
Remedy
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Frequently Asked Questions

1

What is the severity of RHSA-2026:18029?

The severity of RHSA-2026:18029 is classified as critical due to an arbitrary code execution vulnerability in nginx.

2

How do I fix RHSA-2026:18029?

To fix RHSA-2026:18029, you need to update nginx to version 1.20.1-24.el9_7.3 or later.

3

Which systems are affected by RHSA-2026:18029?

RHSA-2026:18029 affects various Red Hat Enterprise Linux products including ARM 64, x86_64, Power, little endian, and IBM z Systems.

4

What does the RHSA-2026:18029 vulnerability involve?

The RHSA-2026:18029 vulnerability involves an arbitrary code execution issue that could potentially allow attackers to execute malicious code on the affected nginx servers.

5

Is there a workaround for RHSA-2026:18029 if I cannot update immediately?

There are no specific workarounds recommended for RHSA-2026:18029; updating to the fixed version is the only solution.

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