Actual Sync Server 26.2.1 - Authenticated Path Traversal

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-3089",
    "assignerOrgId": "84fe0718-d6bb-4716-a7e8-81a6d1daa869",
    "assignerShortName": "Fluid Attacks",
    "dateUpdated": "2026-03-09T14:54:24.136Z",
    "dateReserved": "2026-02-24T00:49:14.624Z",
    "datePublished": "2026-03-09T14:08:55.998Z",
    "state": "PUBLISHED"
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        "shortName": "Fluid Attacks",
        "dateUpdated": "2026-03-09T14:08:55.998Z"
      },
      "title": "Actual Sync Server 26.2.1 - Authenticated Path Traversal",
      "descriptions": [
        {
          "lang": "en",
          "value": "Actual Sync Server allows authenticated users to upload files through POST /sync/upload-user-file. In versions prior to 26.3.0, improper validation of the user-controlled x-actual-file-id header means that traversal segments (../) can escape the intended directory and write files outside userFiles.This issue affects prior versions of Actual Sync Server 26.3.0.",
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              "value": "<span style=\"background-color: rgb(255, 255, 255);\">Actual Sync Server allows authenticated users to upload files through POST /sync/upload-user-file. In versions prior to 26.3.0, improper validation of the user-controlled x-actual-file-id header means that traversal segments (../) can escape the intended directory and write files outside userFiles.</span><p>This issue affects prior versions of Actual Sync Server 26.3.0.</p>"
            }
          ]
        }
      ],
      "affected": [
        {
          "vendor": "Actual",
          "product": "Actual Sync Server",
          "collectionURL": "https://registry.npmjs.org",
          "packageName": "@actual-app/sync-server",
          "platforms": [
            "Windows",
            "MacOS",
            "Linux"
          ],
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "26.2.1",
              "status": "affected"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
              "cweId": "CWE-22",
              "type": "CWE"
            }
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      "references": [
        {
          "url": "https://fluidattacks.com/advisories/fugue",
          "tags": [
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        {
          "url": "https://github.com/actualbudget/actual",
          "tags": [
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        },
        {
          "url": "https://github.com/actualbudget/actual/pull/7067",
          "tags": [
            "patch"
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      ],
      "impacts": [
        {
          "capecId": "CAPEC-126",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-126 Path Traversal"
            }
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      "credits": [
        {
          "lang": "en",
          "value": "Juan Patarroyo",
          "type": "finder"
        }
      ]
    },
    "adp": [
      {
        "providerMetadata": {
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP",
          "dateUpdated": "2026-03-09T14:54:24.136Z"
        },
        "title": "CISA ADP Vulnrichment",
        "references": [
          {
            "url": "https://fluidattacks.com/advisories/fugue",
            "tags": [
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        "metrics": [
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}