Vulnerability Description
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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/actualbudget/actual/commit/068185751c03b42e726e3c60b718413d5f
- https://github.com/actualbudget/actual/releases/tag/v26.6.0
- https://github.com/actualbudget/actual/security/advisories/GHSA-xqjm-27pc-rvwm
FAQ
What is CVE-2026-50179?
CVE-2026-50179 is a vulnerability with a CVSS score of 4.2 (MEDIUM). 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...
How severe is CVE-2026-50179?
CVE-2026-50179 has been rated MEDIUM with a CVSS base score of 4.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-50179?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.