{"id":"RLSA-2026:36639","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.","modified":"2026-07-08T18:26:01.163930557Z","published":"2026-07-08T18:03:20.135265Z","upstream":["CVE-2026-42055"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:36639"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2489866"}],"affected":[{"package":{"name":"nginx","ecosystem":"Rocky Linux:9","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"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:36639.json"}},{"package":{"name":"nginx","ecosystem":"Rocky Linux:9","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"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:36639.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}