RHSA-2026:17751: Critical: nginx security update

Published May 15, 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

71 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux Server - AUS
Red Hat Red Hat Enterprise Linux for ARM 64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux for IBM z Systems - 4 years of updates
Red Hat Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions
redhat/nginx<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-all-modules<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-core<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-core-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-debugsource<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-filesystem<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-image-filter<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-perl<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-perl-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-xslt-filter<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-mail<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-mail-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-stream<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-stream-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-core<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-core-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-debugsource<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-image-filter<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-perl<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-perl-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-xslt-filter<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-mail<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-mail-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-stream<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-stream-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-core<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-core-debuginfo<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-debuginfo<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-debugsource<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-mod-http-image-filter<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-mod-http-perl<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-mod-http-perl-debuginfo<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-mod-http-xslt-filter<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-mod-mail<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-mod-mail-debuginfo<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-mod-stream<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-mod-stream-debuginfo<1.20.1-14.el9_2.6.aa
1.20.1-14.el9_2.6.aa
redhat/nginx-core<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-core-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-debugsource<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-image-filter<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-perl<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-perl-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-xslt-filter<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-mail<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-mail-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-stream<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6
redhat/nginx-mod-stream-debuginfo<1.20.1-14.el9_2.6
1.20.1-14.el9_2.6

Remediation

Event History

May 15, 2026
Advisory Published
via Red Hat·09:42 AM
Data Sourced
via Red Hat·09:42 AM
DescriptionSeverityAffected Software
May 24, 2026
Advisory Published
via Red Hat·10:37 AM
Data Sourced
via Red Hat·10:37 AM
Remedy
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of RHSA-2026:17751?

The severity of RHSA-2026:17751 is classified as critical due to the potential for arbitrary code execution.

2

How do I fix RHSA-2026:17751?

To fix RHSA-2026:17751, update your nginx package to version 1.20.1-14.el9_2.6 or later.

3

What vulnerability does RHSA-2026:17751 address?

RHSA-2026:17751 addresses an arbitrary code execution vulnerability identified as CVE-2026-42945.

4

Which versions of nginx are affected by RHSA-2026:17751?

Affected versions include nginx prior to 1.20.1-14.el9_2.6 across various Red Hat Enterprise Linux distributions.

5

Is it necessary to restart my server after applying the RHSA-2026:17751 update?

Yes, it is recommended to restart your server after applying the RHSA-2026:17751 update to ensure that the changes take effect.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203