{"schema_version": "1.7.0", "id": "RLSA-2026:55859", "modified": "2026-08-18T06:10:14.184370Z", "published": "2026-08-18T06:01:20.072897Z", "upstream": ["CVE-2026-55204"], "summary": "Important: haproxy security update", "details": "The haproxy packages provide a reliable, high-performance network load balancer for TCP and HTTP-based applications.\n\nSecurity Fix(es):\n\n* haproxy: HAProxy: Denial of Service via HPACK dynamic table insertions (CVE-2026-55204)\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:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}], "affected": [{"package": {"ecosystem": "Rocky Linux:8", "name": "haproxy", "purl": "pkg:rpm/rocky-linux/haproxy?distro=rocky-linux-8&epoch=0"}, "ranges": [{"type": "ECOSYSTEM", "events": [{"introduced": "0"}, {"fixed": "0:1.8.27-5.el8_10.2"}], "database_specific": {"yum_repository": "AppStream"}}]}], "references": [{"type": "ADVISORY", "url": "https://errata.rockylinux.org/RLSA-2026:55859"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2490518"}, {"type": "ADVISORY", "url": "https://access.redhat.com/errata/RHSA-2026:55859"}], "credits": [{"name": "Rocky Enterprise Software Foundation"}, {"name": "Red Hat"}], "database_specific": {"license": "CC-BY-4.0", "license_url": "https://creativecommons.org/licenses/by/4.0/", "source_advisory": "RHSA-2026:55859"}}