Actual: CSV Formula Injection in Transaction Export via Imported Payee/Notes Fields

{
  "id": "c0b68959793134a307c3020d23fe138bf01beed45aeb2ba215686f2f28ae57ff",
  "url": "https://osv.dev/vulnerability/CVE-2026-50179",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Actual: CSV Formula Injection in Transaction Export via Imported Payee/Notes Fields",
    "summary": "Actual is a local-first personal finance tool. Prior to 26.6.0, exportToCSV and exportQueryToCSV in packages/loot-core/src/server/transactions/export/export-to-csv.ts pass user-controlled Payee, Notes, Account, and Category strings to csv-stringify with no cast callback and no formula-prefix neutralization. Strings that begin with equals sign, plus, minus, at sign, tab, or carriage return survive verbatim into the exported CSV, and when a recipient opens the file in Excel, LibreOffice Calc, or Google Sheets, the strings are interpreted as formulas, enabling transaction data exfiltration and attacker-chosen spreadsheet display values. This issue is fixed in version 26.6.0.",
    "evidence": "osv:CVE-2026-50179",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-50179",
      "aliases": [
        "CVE-2026-50179",
        "GHSA-xqjm-27pc-rvwm"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/actualbudget/actual",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3a730c160f8e6e4ea68f191d075a46bbbb7073d8"
                },
                {
                  "fixed": "068185751c03b42e726e3c60b718413d5f96c306"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "26.6.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "068185751c03b42e726e3c60b718413d5f96c306"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3a730c160f8e6e4ea68f191d075a46bbbb7073d8"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v26.6.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v26.4.0",
            "v26.3.0",
            "v26.2.0",
            "v26.1.0",
            "v25.12.0",
            "v25.11.0",
            "v25.10.0",
            "v25.9.0",
            "v25.8.0",
            "v25.7.1",
            "v25.7.0",
            "v25.6.1",
            "v25.6.0",
            "v25.5.0",
            "v25.4.0",
            "v25.3.0",
            "v25.2.0",
            "v25.1.0",
            "v24.12.0",
            "v24.11.0",
            "v24.10.0",
            "v24.9.0",
            "v24.8.0",
            "v24.7.0",
            "v24.6.0",
            "v24.5.0",
            "v24.4.0",
            "v24.3.0",
            "v24.2.0",
            "v24.1.0",
            "v23.12.0",
            "v23.11.0",
            "v23.10.0",
            "v23.9.0",
            "v23.8.1",
            "v23.8.0",
            "v23.7.2",
            "v23.7.1",
            "v23.7.0",
            "v23.6.0",
            "v23.5.0",
            "v23.4.2",
            "v23.4.1",
            "v23.4.0",
            "v23.3.2",
            "v23.3.0",
            "v23.2.9",
            "v23.2.5",
            "v23.1.12",
            "v22.12.9"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-50179.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:35.676249155Z",
      "provider": "osv",
      "references": [
        "https://github.com/actualbudget/actual/releases/tag/v26.6.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50179.json",
        "https://github.com/actualbudget/actual/security/advisories/GHSA-xqjm-27pc-rvwm",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-50179",
        "https://github.com/actualbudget/actual/commit/068185751c03b42e726e3c60b718413d5f96c306"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1236"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50179.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-50179",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 503049,
  "published_at": "2026-07-07T20:58:16.074+00:00"
}