What is RHSA-2026:36364?

RHSA-2026:36364 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: nginx security, bug fix, and enhancement update

Which CVE IDs does RHSA-2026:36364 cover?

RHSA-2026:36364 covers the following CVE IDs: CVE-2026-42055. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:36364?

RHSA-2026:36364 has a CVSS v3 base score of 8.1, published by Red Hat Product Security.

Which products are affected by RHSA-2026:36364?

RHSA-2026:36364 affects 101 products, including: Red Hat Enterprise Linux AppStream (v. 10); Red Hat Enterprise Linux CodeReady Linux Builder (v. 10); nginx-2:1.26.3-6.el10_2.5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); nginx-2:1.26.3-6.el10_2.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); and others — see the full list on the advisory page.

RHSA-2026:36364HighCVSS 8.1

Red Hat Security Advisory: nginx security, bug fix, and enhancement update

Vendor

Red Hat Product Security

Published

July 7, 2026

Last Modified

July 27, 2026

🔗 CVE IDs covered (1)

CVE-2026-42055 →

📋 Description

CVE-2026-42055 — nginx: NGINX: Arbitrary code execution or Denial of Service via heap-based buffer overflow with crafted HTTP/2 headers

🎯 Affected products101

Red Hat Enterprise Linux AppStream (v. 10)
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
nginx-2:1.26.3-6.el10_2.5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-2:1.26.3-6.el10_2.5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-2:1.26.3-6.el10_2.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-2:1.26.3-6.el10_2.5.src as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-2:1.26.3-6.el10_2.5.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-all-modules-2:1.26.3-6.el10_2.5.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-core-2:1.26.3-6.el10_2.5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-core-2:1.26.3-6.el10_2.5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-core-2:1.26.3-6.el10_2.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-core-2:1.26.3-6.el10_2.5.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-core-debuginfo-2:1.26.3-6.el10_2.5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-core-debuginfo-2:1.26.3-6.el10_2.5.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
nginx-core-debuginfo-2:1.26.3-6.el10_2.5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-core-debuginfo-2:1.26.3-6.el10_2.5.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
nginx-core-debuginfo-2:1.26.3-6.el10_2.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-core-debuginfo-2:1.26.3-6.el10_2.5.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
nginx-core-debuginfo-2:1.26.3-6.el10_2.5.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-core-debuginfo-2:1.26.3-6.el10_2.5.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
nginx-debuginfo-2:1.26.3-6.el10_2.5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-debuginfo-2:1.26.3-6.el10_2.5.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
nginx-debuginfo-2:1.26.3-6.el10_2.5.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-debuginfo-2:1.26.3-6.el10_2.5.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
nginx-debuginfo-2:1.26.3-6.el10_2.5.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-debuginfo-2:1.26.3-6.el10_2.5.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
nginx-debuginfo-2:1.26.3-6.el10_2.5.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-debuginfo-2:1.26.3-6.el10_2.5.x86_64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
nginx-debugsource-2:1.26.3-6.el10_2.5.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)
nginx-debugsource-2:1.26.3-6.el10_2.5.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)
+71 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: To mitigate this vulnerability, ensure that the `ignore_invalid_headers` directive is set to `on` in your NGINX configuration, or reduce the size specified by the `large_client_header_buffers` directive to 2 megabytes or less. These changes require an NGINX service reload or restart to take effect. Reloading the NGINX service is generally safe, but a restart will briefly interrupt service.

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products101

✅ Remediation

🔗 References (4)