{"id":"RLSA-2026:55439","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.","modified":"2026-08-17T18:30:03.416244981Z","published":"2026-08-17T18:03:57.407277Z","upstream":["CVE-2026-1965","CVE-2026-3783","CVE-2026-8286","CVE-2026-9547"],"database_specific":{"license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","source_advisory":"RHSA-2026:55439"},"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"}],"affected":[{"package":{"name":"curl","ecosystem":"Rocky Linux:9","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"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:55439.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}