{"id":"UBUNTU-CVE-2026-92705","details":"Aegisub is a cross-platform advanced subtitle editor. From 3.2.0 to 3.4.2, Aegisub automatically loads Automation scripts referenced by `Automation Scripts` metadata in `ASS` subtitle projects without asking whether the user trusts the scripts or their authors. An attacker can distribute a crafted `ASS` file together with a referenced malicious Automation script, and opening the `AS`  file executes arbitrary code with the privileges of the Aegisub process. From 3.4.0 to 3.4.2, inconsistent handling of embedded `NUL` characters between extension validation and filesystem operations additionally allows a crafted `ASS/Lua` polyglot to reference and execute itself as a single-file variant. The vulnerability is fixed in Aegisub 3.5.0.","modified":"2026-10-14T03:23:44.649229629Z","published":"2026-10-13T00:00:00Z","upstream":["CVE-2026-92705"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-92705"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-92705"},{"type":"REPORT","url":"https://github.com/TypesettingTools/Aegisub/commit/0a3073d59f10432eeebea65018b02ef4d0a87fff"},{"type":"REPORT","url":"https://github.com/TypesettingTools/Aegisub/commit/b5bf23979e7453f7b1cc8ffeb82b3cc2d2ca75e6"},{"type":"REPORT","url":"https://github.com/TypesettingTools/Aegisub/commit/e4099055711cce327840870c050ce46e58f4aee0"},{"type":"REPORT","url":"https://github.com/TypesettingTools/Aegisub/security/advisories/GHSA-67hq-5vgg-6f23"}],"affected":[{"package":{"name":"aegisub","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/aegisub?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.2+dfsg-2","3.2.2+dfsg-3"],"ecosystem_specific":{"binaries":[{"binary_name":"aegisub","binary_version":"3.2.2+dfsg-3"},{"binary_name":"aegisub-l10n","binary_version":"3.2.2+dfsg-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-92705.json"}},{"package":{"name":"aegisub","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/aegisub?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.2+dfsg-4build1","3.2.2+dfsg-5","3.2.2+dfsg-5ubuntu1","3.2.2+dfsg-5ubuntu2","3.2.2+dfsg-5ubuntu3"],"ecosystem_specific":{"binaries":[{"binary_name":"aegisub","binary_version":"3.2.2+dfsg-5ubuntu3"},{"binary_version":"3.2.2+dfsg-5ubuntu3","binary_name":"aegisub-l10n"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-92705.json"}},{"package":{"name":"aegisub","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/aegisub?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.2+dfsg-7build2","3.2.2+dfsg-7.1","3.2.2+dfsg-7.1build1","3.2.2+dfsg-7.1build2"],"ecosystem_specific":{"binaries":[{"binary_version":"3.2.2+dfsg-7.1build2","binary_name":"aegisub"},{"binary_name":"aegisub-l10n","binary_version":"3.2.2+dfsg-7.1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-92705.json"}},{"package":{"name":"aegisub","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/aegisub?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.2+dfsg-7.2ubuntu2","3.4.2+ds-1build1","3.4.2+ds-1build2","3.4.2+ds-2","3.4.2+ds-3"],"ecosystem_specific":{"binaries":[{"binary_version":"3.4.2+ds-3","binary_name":"aegisub"},{"binary_name":"aegisub-l10n","binary_version":"3.4.2+ds-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-92705.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"}]}