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2026-05-26 16:56CVE-2026-44729GitHub_M
PUBLISHED5.2CWE-79

Twenty: Stored Cross-Site Scripting via Unsanitized File Serving (Missing Content-Type/Content-Disposition Headers)

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.

Problem type

Affected products

twentyhq

twenty

<= 1.18.0 - AFFECTED

References

https://github.com/twentyhq/twenty/security/advisories/GHSA-f5h2-3qw5-3qp7

https://github.com/twentyhq/twenty/security/advisories/GHSA-f5h2-3qw5-3qp7

x_refsource_CONFIRM

JSON source

https://cveawg.mitre.org/api/cve/CVE-2026-44729
Click to expand
{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-44729",
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "dateUpdated": "2026-05-26T16:56:06.012Z",
    "dateReserved": "2026-05-07T18:04:17.309Z",
    "datePublished": "2026-05-26T16:56:06.012Z",
    "state": "PUBLISHED"
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  "containers": {
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        "shortName": "GitHub_M",
        "dateUpdated": "2026-05-26T16:56:06.012Z"
      },
      "title": "Twenty: Stored Cross-Site Scripting via Unsanitized File Serving (Missing Content-Type/Content-Disposition Headers)",
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "affected": [
        {
          "vendor": "twentyhq",
          "product": "twenty",
          "versions": [
            {
              "version": "<= 1.18.0",
              "status": "affected"
            }
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
              "cweId": "CWE-79",
              "type": "CWE"
            }
          ]
        }
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      "references": [
        {
          "url": "https://github.com/twentyhq/twenty/security/advisories/GHSA-f5h2-3qw5-3qp7",
          "name": "https://github.com/twentyhq/twenty/security/advisories/GHSA-f5h2-3qw5-3qp7",
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "LOW",
            "userInteraction": "REQUIRED",
            "scope": "CHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "availabilityImpact": "NONE",
            "baseScore": 8.7,
            "baseSeverity": "HIGH"
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}