What’s Vulnerable › Vulnerabilities

CVE-2026-50179: Actual: CSV Formula Injection in Transaction Export via Imported Payee/Notes Fields

• Severity: medium (CVSS 4.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-07 · updated 2026-10-25
• Weakness: CWE-1236

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.

Affected products

• actualbudget actual: before 26.6.0

References

• https://github.com/actualbudget/actual/commit/068185751c03b42e726e3c60b718413d5f96c306
• https://github.com/actualbudget/actual/releases/tag/v26.6.0
• https://github.com/actualbudget/actual/security/advisories/GHSA-xqjm-27pc-rvwm

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