{"id":"DEBIAN-CVE-2026-57585","details":"MessagePack is the serializer implementation for Python msgpack.org. Prior to 1.2.1, there is an Out-of-bounds read/crash on Unpacker reuse after a caught error, potentially leading to a DoS attack.  If the Unpacker is used repeatedly after an error occurs, the process may crash with a SEGV. This issue has been fixed in version 1.2.1.","modified":"2026-09-01T16:06:52.762111642Z","published":"2026-06-30T22:16:57.837Z","upstream":["CVE-2026-57585"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-57585"}],"affected":[{"package":{"name":"python-msgpack","ecosystem":"Debian:12","purl":"pkg:deb/debian/python-msgpack?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.3-2","1.0.3-3","1.1.2-1","1.1.2-2","1.1.2-3","1.1.2-4"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-57585.json"}},{"package":{"name":"python-msgpack","ecosystem":"Debian:13","purl":"pkg:deb/debian/python-msgpack?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.3-3","1.1.2-1","1.1.2-2","1.1.2-3","1.1.2-4"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-57585.json"}},{"package":{"name":"python-msgpack","ecosystem":"Debian:14","purl":"pkg:deb/debian/python-msgpack?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.1.2-3"}]}],"versions":["1.0.3-3","1.1.2-1","1.1.2-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-57585.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:N/I:N/A:H"}]}