High
aegisub — security advisory
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.
- Products
- aegisub
- Affected versions
- 3.2.2+dfsg-2, 3.2.2+dfsg-3, 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, 3.2.2+dfsg-7.1, 3.2.2+dfsg-7.1build1, 3.2.2+dfsg-7.1build2, 3.2.2+dfsg-7.2ubuntu2, 3.2.2+dfsg-7build2, 3.4.2+ds-1build1, 3.4.2+ds-1build2, 3.4.2+ds-2, 3.4.2+ds-3, 3.4.2+ds-4, 3.4.2+ds-5
- Fixed versions
- Not specified
- CVEs
- CVE-2026-92705
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:51 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-92705
aegisub
Fixed versions: Not specified
aegisub
Fixed versions: Not specified
aegisub
Fixed versions: Not specified
aegisub
Fixed versions: Not specified
aegisub
Fixed versions: Not specified
Complete source record
{
"id": "b90b71ca012dbad1d8fb7c3acc023947289122d3cd8b451194124a907c450661",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-92705",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-92705",
"summary": "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.",
"evidence": "osv:UBUNTU-CVE-2026-92705",
"products": [
{
"name": {
"value": "aegisub",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.2.2+dfsg-2",
"evidence": "/affected/0/versions"
},
{
"value": "3.2.2+dfsg-3",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "aegisub",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
"value": "3.2.2+dfsg-4build1",
"evidence": "/affected/1/versions"
},
{
"value": "3.2.2+dfsg-5",
"evidence": "/affected/1/versions"
},
{
"value": "3.2.2+dfsg-5ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "3.2.2+dfsg-5ubuntu2",
"evidence": "/affected/1/versions"
},
{
"value": "3.2.2+dfsg-5ubuntu3",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
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"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.2.2+dfsg-7build2",
"evidence": "/affected/2/versions"
},
{
"value": "3.2.2+dfsg-7.1",
"evidence": "/affected/2/versions"
},
{
"value": "3.2.2+dfsg-7.1build1",
"evidence": "/affected/2/versions"
},
{
"value": "3.2.2+dfsg-7.1build2",
"evidence": "/affected/2/versions"
}
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},
{
"name": {
"value": "aegisub",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.4.2+ds-3",
"evidence": "/affected/3/versions"
},
{
"value": "3.4.2+ds-4",
"evidence": "/affected/3/versions"
},
{
"value": "3.4.2+ds-5",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "aegisub",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.2.2+dfsg-7.2ubuntu2",
"evidence": "/affected/4/versions"
},
{
"value": "3.4.2+ds-1build1",
"evidence": "/affected/4/versions"
},
{
"value": "3.4.2+ds-1build2",
"evidence": "/affected/4/versions"
},
{
"value": "3.4.2+ds-2",
"evidence": "/affected/4/versions"
},
{
"value": "3.4.2+ds-3",
"evidence": "/affected/4/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2026-92705",
"aliases": [
"UBUNTU-CVE-2026-92705"
],
"metrics": [
{
"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"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "aegisub",
"purl": "pkg:deb/ubuntu/aegisub?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"3.2.2+dfsg-2",
"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"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "aegisub",
"binary_version": "3.2.2+dfsg-3"
},
{
"binary_name": "aegisub-l10n",
"binary_version": "3.2.2+dfsg-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "aegisub",
"purl": "pkg:deb/ubuntu/aegisub?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-92705.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "aegisub",
"binary_version": "3.2.2+dfsg-5ubuntu3"
},
{
"binary_name": "aegisub-l10n",
"binary_version": "3.2.2+dfsg-5ubuntu3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "aegisub",
"purl": "pkg:deb/ubuntu/aegisub?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"3.2.2+dfsg-7build2",
"3.2.2+dfsg-7.1",
"3.2.2+dfsg-7.1build1",
"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"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "aegisub",
"binary_version": "3.2.2+dfsg-7.1build2"
},
{
"binary_name": "aegisub-l10n",
"binary_version": "3.2.2+dfsg-7.1build2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
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"introduced": "0"
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],
"package": {
"name": "aegisub",
"purl": "pkg:deb/ubuntu/aegisub?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"3.4.2+ds-3",
"3.4.2+ds-4",
"3.4.2+ds-5"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-92705.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "aegisub",
"binary_version": "3.4.2+ds-5"
},
{
"binary_name": "aegisub-common",
"binary_version": "3.4.2+ds-5"
},
{
"binary_name": "aegisub-l10n",
"binary_version": "3.4.2+ds-5"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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}
]
}
],
"package": {
"name": "aegisub",
"purl": "pkg:deb/ubuntu/aegisub?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"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"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-92705.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "aegisub",
"binary_version": "3.4.2+ds-3"
},
{
"binary_name": "aegisub-l10n",
"binary_version": "3.4.2+ds-3"
}
]
}
}
],
"modified": "2026-10-17T12:56:12.064692231Z",
"provider": "osv",
"upstream": [
"CVE-2026-92705"
],
"references": [
"https://ubuntu.com/security/CVE-2026-92705",
"https://www.cve.org/CVERecord?id=CVE-2026-92705",
"https://github.com/TypesettingTools/Aegisub/commit/0a3073d59f10432eeebea65018b02ef4d0a87fff",
"https://github.com/TypesettingTools/Aegisub/commit/b5bf23979e7453f7b1cc8ffeb82b3cc2d2ca75e6",
"https://github.com/TypesettingTools/Aegisub/commit/e4099055711cce327840870c050ce46e58f4aee0",
"https://github.com/TypesettingTools/Aegisub/security/advisories/GHSA-67hq-5vgg-6f23"
]
},
"related_cves": [
{
"value": "CVE-2026-92705",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 354944,
"published_at": "2026-10-09T21:17:00+00:00"
}