{"id":"USN-8518-1","summary":"mailcap vulnerability","details":"Aaron Rainbolt discovered that the cautious-launcher utility in the\nmailcap package did not properly restrict the execution of certain\nfile types. An attacker could use this issue to escape a sandboxed\napplication and execute arbitrary code on the host operating system.","modified":"2026-07-09T21:30:13.279330488Z","published":"2026-07-08T17:15:41Z","related":["UBUNTU-CVE-2026-10037"],"upstream":["UBUNTU-CVE-2026-10037"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8518-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-10037"}],"affected":[{"package":{"name":"mailcap","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/mailcap?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.70+nmu1ubuntu1.22.04.1"}]}],"versions":["3.69ubuntu1","3.70ubuntu1","3.70+nmu1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.70+nmu1ubuntu1.22.04.1","binary_name":"mailcap"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"id":"CVE-2026-10037","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8518-1.json"}},{"package":{"name":"mailcap","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/mailcap?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.70+nmu1ubuntu1.24.04.1"}]}],"versions":["3.70+nmu1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"mailcap","binary_version":"3.70+nmu1ubuntu1.24.04.1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"id":"CVE-2026-10037","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8518-1.json"}},{"package":{"name":"mailcap","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/mailcap?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.74ubuntu1.1"}]}],"versions":["3.74ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"3.74ubuntu1.1","binary_name":"mailcap"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:25.10","cves":[{"id":"CVE-2026-10037","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8518-1.json"}},{"package":{"name":"mailcap","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/mailcap?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.75ubuntu1.1"}]}],"versions":["3.74ubuntu1","3.75ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"mailcap","binary_version":"3.75ubuntu1.1"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:26.04:LTS","cves":[{"id":"CVE-2026-10037","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8518-1.json"}}],"schema_version":"1.7.5"}