{"schema_version": "1.7.0", "id": "RLSA-2026:36639", "modified": "2026-07-08T18:06:46.098624Z", "published": "2026-07-08T18:03:20.135265Z", "upstream": ["CVE-2026-42055"], "summary": "Important: nginx:1.26 security, bug fix, and enhancement update", "details": "nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage. \n\nSecurity Fix(es):\n\n* nginx: NGINX: Arbitrary code execution or Denial of Service via heap-based buffer overflow with crafted HTTP/2 headers (CVE-2026-42055)\n\nBug Fix(es) and Enhancement(s):\n\n* nginx:1.26/nginx: \"HTTP/2 bomb\" nginx fix breaks module ABI causing crashes [rhel-9.8.z] (JIRA:Rocky Linux-191774)\n\nFor 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.", "severity": [{"type": "CVSS_V3", "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}], "affected": [{"package": {"ecosystem": "Rocky Linux:9", "name": "nginx", "purl": "pkg:rpm/rocky-linux/nginx?distro=rocky-linux-9&epoch=2"}, "ranges": [{"type": "ECOSYSTEM", "events": [{"introduced": "0"}, {"fixed": "2:1.26.3-9.module+el9.8.0+40222+e48d13b6.1"}], "database_specific": {"yum_repository": "AppStream"}}]}, {"package": {"ecosystem": "Rocky Linux:9", "name": "nginx", "purl": "pkg:rpm/rocky-linux/nginx?distro=rocky-linux-9&epoch=2"}, "ranges": [{"type": "ECOSYSTEM", "events": [{"introduced": "0"}, {"fixed": "2:1.26.3-9.module+el9.8.0+40194+40adfc1b"}], "database_specific": {"yum_repository": "AppStream"}}]}], "references": [{"type": "ADVISORY", "url": "https://errata.rockylinux.org/RLSA-2026:36639"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2489866"}], "credits": [{"name": "Rocky Enterprise Software Foundation"}, {"name": "Red Hat"}]}