RHSA-2026:98529: Important: nginx security update

Published Nov 11, 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: NGINX: Denial of Service or file modification via buffer overflow in ngxhttpdavmodule (CVE-2026-27654) NGINX: NGINX: Denial of Service due to memory corruption via crafted MP4 file (CVE-2026-27784) NGINX: NGINX: Denial of Service via undisclosed requests when ngxmailauthhttpmodule is enabled (CVE-2026-27651) nginx: nginx: heap-based buffer overflow in ngxhttpcoremodule via alias with rewrite referencing $requestfilename (CVE-2026-15176) nginx: NGINX ngxhttpcoremodule vulnerability (CVE-2026-97205) 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<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-all-modules<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-core<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-core-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-debugsource<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-filesystem<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-image-filter<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-perl<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-perl-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-xslt-filter<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-mail<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-mail-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-stream<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-stream-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-core<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-core-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-debugsource<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-image-filter<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-perl<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-perl-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-xslt-filter<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-mail<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-mail-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-stream<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-stream-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-core<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-core-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-debugsource<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-image-filter<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-perl<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-perl-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-xslt-filter<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-mail<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-mail-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-stream<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-stream-debuginfo<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-core<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-core-debuginfo<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-debuginfo<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-debugsource<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-mod-http-image-filter<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-mod-http-image-filter-debuginfo<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-mod-http-perl<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-mod-http-perl-debuginfo<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-mod-http-xslt-filter<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-mod-http-xslt-filter-debuginfo<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-mod-mail<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-mod-mail-debuginfo<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-mod-stream<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-mod-stream-debuginfo<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-mod-devel<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-devel<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1
redhat/nginx-mod-devel<1.20.1-32.el9_9.1.aa
1.20.1-32.el9_9.1.aa
redhat/nginx-mod-devel<1.20.1-32.el9_9.1
1.20.1-32.el9_9.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  2. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  3. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  4. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  5. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  6. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  7. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  8. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  9. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  10. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  11. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  12. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  13. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  14. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  15. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  16. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  17. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  18. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  19. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  20. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  21. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  22. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  23. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  24. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  25. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  26. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  27. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  28. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  29. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  30. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  31. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  32. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa
  33. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1
  34. Upgrade

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

    Fixed in 1.20.1-32.el9_9.1.aa

Event History

Nov 11, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software

Frequently Asked Questions

1

Which nginx configurations are specifically identified as exposed?

The listed issues specifically reference configurations using ngx_http_dav_module, ngx_mail_auth_http_module, or ngx_http_core_module. One core-module issue involves an alias combined with a rewrite that references $request_filename, and another requires processing a crafted MP4 file.

2

What attacker-controlled input is associated with these issues?

The advisory identifies crafted MP4 files for one denial-of-service issue and undisclosed requests when ngx_mail_auth_http_module is enabled for another. The alias/rewrite issue is associated with configurations that reference $request_filename.

3

What impacts are described?

The stated impacts include denial of service, file modification through a buffer overflow in ngx_http_dav_module, memory corruption when handling a crafted MP4 file, and a heap-based buffer overflow in ngx_http_core_module.

4

Which Red Hat packages are covered by this update?

The affected software list includes redhat/nginx, redhat/nginx-core, their debuginfo and debugsource packages, and the redhat/nginx-mod-http-image-filter and redhat/nginx-mod-http-perl module packages.

Company

Resources

Contact

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