RHSA-2026:93467: Important: nginx security update

Published Nov 2, 2026
·
Updated

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: ngxhttprewritemodule: code execution and denial of service (CVE-2026-9256) nginx: NGINX: Arbitrary code execution or Denial of Service via heap-based buffer overflow with crafted HTTP/2 headers (CVE-2026-42055) nginx: NGINX: Heap buffer over-read allows memory modification or denial of service (CVE-2026-56434) nginx: NGINX: Arbitrary code execution via crafted HTTP requests (CVE-2026-42533) nginx: NGINX: Memory disclosure and denial of service in ngxhttpslicemodule (CVE-2026-60005) 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.

Affected Software

66 affected componentsFixes available
redhat/nginx<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-all-modules<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-core<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-core-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-debugsource<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-filesystem<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-image-filter<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-perl<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-perl-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-xslt-filter<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-mail<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-mail-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-stream<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-stream-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-core<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-core-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-debugsource<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-image-filter<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-perl<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-perl-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-xslt-filter<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-mail<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-mail-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-stream<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-stream-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-core<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-core-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-debugsource<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-image-filter<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-perl<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-perl-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-xslt-filter<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-mail<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-mail-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-stream<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-stream-debuginfo<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-core<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-core-debuginfo<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-debuginfo<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-debugsource<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-mod-http-image-filter<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-mod-http-perl<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-mod-http-perl-debuginfo<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-mod-http-xslt-filter<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-mod-mail<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-mod-mail-debuginfo<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-mod-stream<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-mod-stream-debuginfo<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa
redhat/nginx-mod-devel<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-devel<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-devel<1.20.1-22.el9_6.7
1.20.1-22.el9_6.7
redhat/nginx-mod-devel<1.20.1-22.el9_6.7.aa
1.20.1-22.el9_6.7.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/nginx to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  2. Upgrade

    Upgrade redhat/nginx-all-modules to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  3. Upgrade

    Upgrade redhat/nginx-core to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  4. Upgrade

    Upgrade redhat/nginx-core-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  5. Upgrade

    Upgrade redhat/nginx-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  6. Upgrade

    Upgrade redhat/nginx-debugsource to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  7. Upgrade

    Upgrade redhat/nginx-filesystem to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  8. Upgrade

    Upgrade redhat/nginx-mod-http-image-filter to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  9. Upgrade

    Upgrade redhat/nginx-mod-http-image-filter-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  10. Upgrade

    Upgrade redhat/nginx-mod-http-perl to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  11. Upgrade

    Upgrade redhat/nginx-mod-http-perl-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  12. Upgrade

    Upgrade redhat/nginx-mod-http-xslt-filter to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  13. Upgrade

    Upgrade redhat/nginx-mod-http-xslt-filter-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  14. Upgrade

    Upgrade redhat/nginx-mod-mail to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  15. Upgrade

    Upgrade redhat/nginx-mod-mail-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  16. Upgrade

    Upgrade redhat/nginx-mod-stream to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  17. Upgrade

    Upgrade redhat/nginx-mod-stream-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  18. Upgrade

    Upgrade redhat/nginx to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  19. Upgrade

    Upgrade redhat/nginx-core to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  20. Upgrade

    Upgrade redhat/nginx-core-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  21. Upgrade

    Upgrade redhat/nginx-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  22. Upgrade

    Upgrade redhat/nginx-debugsource to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  23. Upgrade

    Upgrade redhat/nginx-mod-http-image-filter to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  24. Upgrade

    Upgrade redhat/nginx-mod-http-image-filter-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  25. Upgrade

    Upgrade redhat/nginx-mod-http-perl to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  26. Upgrade

    Upgrade redhat/nginx-mod-http-perl-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  27. Upgrade

    Upgrade redhat/nginx-mod-http-xslt-filter to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  28. Upgrade

    Upgrade redhat/nginx-mod-http-xslt-filter-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  29. Upgrade

    Upgrade redhat/nginx-mod-mail to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  30. Upgrade

    Upgrade redhat/nginx-mod-mail-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  31. Upgrade

    Upgrade redhat/nginx-mod-stream to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  32. Upgrade

    Upgrade redhat/nginx-mod-stream-debuginfo to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa
  33. Upgrade

    Upgrade redhat/nginx-mod-devel to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7
  34. Upgrade

    Upgrade redhat/nginx-mod-devel to a version that resolves this vulnerability.

    Fixed in 1.20.1-22.el9_6.7.aa

Event History

Nov 2, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software

Frequently Asked Questions

1

What kinds of attacker input are involved in the reported issues?

The update addresses flaws triggered by crafted HTTP/2 headers and crafted HTTP requests. The listed impacts include arbitrary code execution, denial of service, memory disclosure, and memory modification.

2

Which nginx modules are specifically named in the security fixes?

The fixes specifically identify ngx_http_rewrite_module for code execution and denial of service, and ngx_http_slice_module for memory disclosure and denial of service. Other listed issues are described as affecting NGINX generally.

3

Which Red Hat package variants are included in this update?

The advisory lists redhat/nginx, redhat/nginx-core, debug and debuginfo packages, redhat/nginx-mod-http-image-filter and its debuginfo package, and redhat/nginx-mod-http-perl.

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