CVE-2026-50179 Actual: CSV Formula Injection in Transaction Export via Imported Payee/Notes Fields
Attackers can inject malicious formulas into CSV exports via imported fields, leading to data exfiltration when opened in spreadsheet software.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-50179?
CVE-2026-50179 is a medium-severity vulnerability in actualbudget actual, published on 7 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-1236
Which versions are affected by CVE-2026-50179?
2 open source packages ship an affected version, including @actual-app/web.
| Package | Affected | Fixed in |
|---|---|---|
@actual-app/web npm | All versions | 26.6.0 |
@actual-app/web npm | All versions | 26.6.0 |
How do I fix CVE-2026-50179?
Upgrade @actual-app/web to 26.6.0 or later.
Is CVE-2026-50179 being exploited?
There is no known exploitation of CVE-2026-50179 in the wild and no public exploit code.
Sources
Also known as GHSA-xqjm-27pc-rvwm.