Summary
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: "HTTP/2 bomb" nginx fix breaks module ABI causing crashes [almalinux-9.8.z] (JIRA:AlmaLinux-190800)
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.
Fixed packages 10
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 9 | nginx | 2:1.20.1-28.el9_8.4.alma.1 |
| AlmaLinux · 9 | nginx-all-modules | 2:1.20.1-28.el9_8.4.alma.1 |
| AlmaLinux · 9 | nginx-core | 2:1.20.1-28.el9_8.4.alma.1 |
| AlmaLinux · 9 | nginx-filesystem | 2:1.20.1-28.el9_8.4.alma.1 |
| AlmaLinux · 9 | nginx-mod-devel | 2:1.20.1-28.el9_8.4.alma.1 |
| AlmaLinux · 9 | nginx-mod-http-image-filter | 2:1.20.1-28.el9_8.4.alma.1 |
| AlmaLinux · 9 | nginx-mod-http-perl | 2:1.20.1-28.el9_8.4.alma.1 |
| AlmaLinux · 9 | nginx-mod-http-xslt-filter | 2:1.20.1-28.el9_8.4.alma.1 |
| AlmaLinux · 9 | nginx-mod-mail | 2:1.20.1-28.el9_8.4.alma.1 |
| AlmaLinux · 9 | nginx-mod-stream | 2:1.20.1-28.el9_8.4.alma.1 |
Vulnerabilities 1
-
High 8.1CVE-2026-42055 Public exploit
NGINX ngx_http_proxy_v2_module and ngx_http_grpc_module vulnerability
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_proxy_v2_module and ngx_http_grpc_module modules. This vulnerability exists when the proxy_http_version to 2 or grpc_pass directives are used to proxy HTTP/2 traffic, the ignore_invalid_hea…