{"id":"UBUNTU-CVE-2026-42851","details":"Kitty is a cross-platform GPU based terminal. In versions prior to 0.47.0, a program able to write bytes to a kitty terminal — a remote SSH peer, a downloaded file viewed with `cat`, a log line, an email body rendered in `less`, an issue body in a TUI, etc. — can cause kitty to execute attacker-supplied Python inside the running kitty process, with the user's full privileges. There is no approval prompt, no remote-control permission requirement, no shell-integration interaction, no clipboard touch, and no editor interaction. Version 0.47.0 fixes the issue.","modified":"2026-09-15T20:16:39.460368663Z","published":"2026-06-12T20:16:00Z","related":["USN-8763-1"],"upstream":["CVE-2026-42851"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42851"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-42851"},{"type":"REPORT","url":"https://github.com/kovidgoyal/kitty/security/advisories/GHSA-w98g-hpvr-r332"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8763-1"}],"affected":[{"package":{"name":"kitty","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/kitty?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.32.2-1ubuntu0.4+esm2"}]}],"versions":["0.26.5-3ubuntu2","0.26.5-5ubuntu1","0.31.0-3","0.31.0-4","0.32.2-1","0.32.2-1build2","0.32.2-1build3","0.32.2-1ubuntu0.1","0.32.2-1ubuntu0.2","0.32.2-1ubuntu0.3","0.32.2-1ubuntu0.4","0.32.2-1ubuntu0.4+esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"kitty","binary_version":"0.32.2-1ubuntu0.4+esm2"},{"binary_name":"kitty-shell-integration","binary_version":"0.32.2-1ubuntu0.4+esm2"},{"binary_version":"0.32.2-1ubuntu0.4+esm2","binary_name":"kitty-terminfo"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42851.json"}},{"package":{"name":"kitty","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/kitty?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.39.1-1","0.41.1-2","0.41.1-2+deb13u1build0.25.10.1"],"ecosystem_specific":{"binaries":[{"binary_name":"kitty","binary_version":"0.41.1-2+deb13u1build0.25.10.1"},{"binary_name":"kitty-shell-integration","binary_version":"0.41.1-2+deb13u1build0.25.10.1"},{"binary_name":"kitty-terminfo","binary_version":"0.41.1-2+deb13u1build0.25.10.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42851.json"}},{"package":{"name":"kitty","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/kitty?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.45.0-1ubuntu0.1~esm2"}]}],"versions":["0.41.1-2","0.43.1-1","0.44.0-1","0.45.0-1","0.45.0-1build1","0.45.0-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"kitty","binary_version":"0.45.0-1ubuntu0.1~esm2"},{"binary_version":"0.45.0-1ubuntu0.1~esm2","binary_name":"kitty-shell-integration"},{"binary_version":"0.45.0-1ubuntu0.1~esm2","binary_name":"kitty-terminfo"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42851.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}