{"schema_version": "1.7.0", "id": "RLSA-2026:55439", "modified": "2026-08-17T18:09:13.544722Z", "published": "2026-08-17T18:03:57.407277Z", "upstream": ["CVE-2026-1965", "CVE-2026-3783", "CVE-2026-8286", "CVE-2026-9547"], "summary": "Important: curl security update", "details": "The curl packages provide the libcurl library and the curl utility for downloading files from servers using various protocols, including HTTP, FTP, and LDAP.\n\nSecurity Fix(es):\n\n* curl: curl: Authentication bypass due to incorrect connection reuse with Negotiate authentication (CVE-2026-1965)\n\n* curl: curl: Information disclosure via OAuth2 bearer token leakage during HTTP(S) redirect (CVE-2026-3783)\n\n* curl: curl: Man-in-the-middle attack via SSH host key bypass (CVE-2026-9547)\n\n* curl: curl: Insecure connection establishment due to TLS configuration mismatch (CVE-2026-8286)\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:R/S:U/C:H/I:H/A:N"}], "affected": [{"package": {"ecosystem": "Rocky Linux:9", "name": "curl", "purl": "pkg:rpm/rocky-linux/curl?distro=rocky-linux-9&epoch=0"}, "ranges": [{"type": "ECOSYSTEM", "events": [{"introduced": "0"}, {"fixed": "0:7.76.1-40.el9_8.5"}], "database_specific": {"yum_repository": "BaseOS"}}]}], "references": [{"type": "ADVISORY", "url": "https://errata.rockylinux.org/RLSA-2026:55439"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2446448"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2446450"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2496758"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2496763"}, {"type": "ADVISORY", "url": "https://access.redhat.com/errata/RHSA-2026:55439"}], "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-2026:55439"}}