High
Twenty: Stored Cross-Site Scripting via Unsanitized File Serving (Missing Content-Type/Content-Disposition Headers)
Type: advisorySources: OSV
Twenty is an open source CRM. In 1.18.0 and earlier, the file serving endpoints in Twenty CRM at /files/* and /file/:fileFolder/:id serve uploaded files using fileStream.pipe(res) without setting any Content-Type, Content-Disposition, or X-Content-Type-Options response headers. This allows an authenticated attacker to upload an HTML file containing JavaScript, which will be rendered by the victim's browser in the context of the Twenty CRM domain when accessed — enabling session hijacking, account takeover, and data theft.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-44729
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 8 Nov 2026, 01:17 UTC · Revision 1
Source evidence
Twenty: Stored Cross-Site Scripting via Unsanitized File Serving (Missing Content-Type/Content-Disposition Headers)
core-osv · Original sourcePublished 26 May 2026, 16:56 UTC
Twenty is an open source CRM. In 1.18.0 and earlier, the file serving endpoints in Twenty CRM at /files/* and /file/:fileFolder/:id serve uploaded files using fileStream.pipe(res) without setting any Content-Type, Content-Disposition, or X-Content-Type-Options response headers. This allows an authenticated attacker to upload an HTML file containing JavaScript, which will be rendered by the victim's browser in the context of the Twenty CRM domain when accessed — enabling session hijacking, account takeover, and data theft.
osv:CVE-2026-44729
Complete source record
{
"id": "31f919bc22fa6c2c4b16eb823abf7e54d57e50c99ac0bc4def553681c8c6ab73",
"url": "https://osv.dev/vulnerability/CVE-2026-44729",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Twenty: Stored Cross-Site Scripting via Unsanitized File Serving (Missing Content-Type/Content-Disposition Headers)",
"summary": "Twenty is an open source CRM. In 1.18.0 and earlier, the file serving endpoints in Twenty CRM at /files/* and /file/:fileFolder/:id serve uploaded files using fileStream.pipe(res) without setting any Content-Type, Content-Disposition, or X-Content-Type-Options response headers. This allows an authenticated attacker to upload an HTML file containing JavaScript, which will be rendered by the victim's browser in the context of the Twenty CRM domain when accessed — enabling session hijacking, account takeover, and data theft.",
"evidence": "osv:CVE-2026-44729",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-44729",
"aliases": [
"CVE-2026-44729",
"GHSA-f5h2-3qw5-3qp7"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/twentyhq/twenty",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "38a49650a38825f21213bca45c76be46d0535504"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"last_affected": "1.18.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"cpe": "cpe:2.3:a:twenty:twenty:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "1.18.0"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v1.17.0",
"v1.18.0",
"v1.16.16",
"v1.16.15",
"v1.16.14",
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"v1.4.1",
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"v1.3.1",
"v1.3.0",
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"v1.1.0",
"v1.0.4",
"v1.0.0",
"v0.60.7",
"v0.60.6",
"v0.60.5",
"v0.60.4",
"v0.60.2",
"v0.55.7",
"v0.55.5",
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"v0.55.3",
"v0.55.2",
"v0.55.0",
"v0.54.7",
"v0.53.7",
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"v0.53.2",
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"v0.2.1",
"v0.1.4",
"v0.1.3",
"v0.1.2",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44729.json"
}
}
],
"modified": "2026-10-28T02:30:52.525308569Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44729.json",
"https://github.com/twentyhq/twenty/security/advisories/GHSA-f5h2-3qw5-3qp7",
"https://nvd.nist.gov/vuln/detail/CVE-2026-44729"
],
"provider_metadata": {
"cwe_ids": [
"CWE-79"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44729.json"
}
},
"related_cves": [
{
"value": "CVE-2026-44729",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 521268,
"published_at": "2026-05-26T16:56:06.012+00:00"
}