{"id":"DEBIAN-CVE-2026-5773","details":"libcurl might in some circumstances reuse the wrong connection for SMB(S) transfers.  libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead.  When reusing a connection a range of criteria must be met. Due to a logical error in the code, a network transfer operation that was requested by an application could wrongfully reuse an existing SMB connection to the same server that was using a different \"share\" than the new subsequent transfer should.  This could in unlucky situations lead to the download of the wrong file or the upload of a file to the wrong place. When this happens, the same credentials are used and the server name is the same.","modified":"2026-09-16T08:47:43.686623367Z","published":"2026-05-13T13:01:56.307Z","upstream":["CVE-2026-5773"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-5773"}],"affected":[{"package":{"name":"curl","ecosystem":"Debian:12","purl":"pkg:deb/debian/curl?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.88.1-10+deb12u15"}]}],"versions":["7.88.1-10","7.88.1-10+deb12u1","7.88.1-10+deb12u11","7.88.1-10+deb12u12","7.88.1-10+deb12u13","7.88.1-10+deb12u14","7.88.1-10+deb12u1~bpo11+1","7.88.1-10+deb12u2","7.88.1-10+deb12u3","7.88.1-10+deb12u3~bpo11+1","7.88.1-10+deb12u4","7.88.1-10+deb12u5","7.88.1-10+deb12u5~bpo11+1","7.88.1-10+deb12u6","7.88.1-10+deb12u6~bpo11+1","7.88.1-10+deb12u7","7.88.1-10+deb12u8","7.88.1-10+deb12u9"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5773.json"}},{"package":{"name":"curl","ecosystem":"Debian:13","purl":"pkg:deb/debian/curl?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.14.1-2+deb13u4"}]}],"versions":["8.14.1-2","8.14.1-2+deb13u1","8.14.1-2+deb13u2","8.14.1-2+deb13u2~bpo13+1","8.14.1-2+deb13u3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5773.json"}},{"package":{"name":"curl","ecosystem":"Debian:14","purl":"pkg:deb/debian/curl?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.20.0~rc2-1"}]}],"versions":["8.14.1-2","8.14.1-2+exp1","8.15.0-1","8.15.0-1~bpo13+1","8.15.0-1~exp1","8.15.0~rc1-1exp1","8.15.0~rc2-1~exp1","8.15.0~rc3-1~exp1","8.16.0-1","8.16.0-1+exp1","8.16.0-1~bpo13+1","8.16.0-2","8.16.0-3","8.16.0-4","8.16.0-4~bpo13+1","8.16.0~rc1-1~exp1","8.16.0~rc2-1","8.16.0~rc2-2","8.16.0~rc3-1","8.17.0-1","8.17.0-2","8.17.0-3","8.17.0~rc1-1~exp1","8.17.0~rc2-1","8.17.0~rc3-1","8.18.0-1","8.18.0-1~bpo13+1","8.18.0-2","8.18.0~rc1-1+exp1","8.18.0~rc2-1","8.18.0~rc3-1","8.19.0-1","8.19.0-1+exp1","8.19.0-1~bpo13+1","8.19.0-2","8.19.0-3","8.19.0-3+exp1","8.19.0-3+exp2","8.19.0~rc1-1~exp1","8.19.0~rc2-1","8.19.0~rc2-2","8.19.0~rc3-1","8.20.0~rc1-1+exp1","8.20.0~rc1-1+exp2","8.20.0~rc1-1+exp3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-5773.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}