{"id":"ALSA-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  * curl: curl: Information disclosure via OAuth2 bearer token leakage during HTTP(S) redirect (CVE-2026-3783)\n  * curl: curl: Man-in-the-middle attack via SSH host key bypass (CVE-2026-9547)\n  * curl: curl: Insecure connection establishment due to TLS configuration mismatch (CVE-2026-8286)\n\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.\n","modified":"2026-08-18T13:27:13.126458077Z","published":"2026-08-17T00:00:00Z","related":["CVE-2026-1965","CVE-2026-3783","CVE-2026-8286","CVE-2026-9547"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:55439"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-1965"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-3783"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-8286"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-9547"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2446448"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2446450"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2496758"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2496763"},{"type":"ADVISORY","url":"https://errata.almalinux.org/9/ALSA-2026-55439.html"}],"affected":[{"package":{"name":"curl","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/curl"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.76.1-40.el9_8.5"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:55439.json"}},{"package":{"name":"curl-minimal","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/curl-minimal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.76.1-40.el9_8.5"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:55439.json"}},{"package":{"name":"libcurl","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/libcurl"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.76.1-40.el9_8.5"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:55439.json"}},{"package":{"name":"libcurl-devel","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/libcurl-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.76.1-40.el9_8.5"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:55439.json"}},{"package":{"name":"libcurl-minimal","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/libcurl-minimal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.76.1-40.el9_8.5"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:55439.json"}}],"schema_version":"1.9.0"}