RHSA-2026:36639 — Security Advisory
Red Hat Security Advisory: nginx:1.26 security, bug fix, and enhancement update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · July 8, 2026
Updated · November 2, 2026
Topic
An update for the nginx:1.26 module is now available for Red Hat Enterprise Linux 9.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
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 or Denial of Service via heap-based buffer overflow with crafted HTTP/2 headers (CVE-2026-42055)
Bug Fix(es) and Enhancement(s):
- nginx:1.26/nginx: "HTTP/2 bomb" nginx fix breaks module ABI causing crashes [rhel-9.8.z] (JIRA:RHEL-191774)
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.