Actual: CSV Formula Injection in `@actual-app/cli` `--format csv` Output via Custom `escapeCsv` Helper

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Summary

CVECVE-2026-46672
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-07 21:17:25 UTC
Updated2026-07-08 15:28:15 UTC
DescriptionActual is a local-first personal finance app. Prior to 26.6.0, @actual-app/cli ships a hand-rolled CSV serializer in packages/cli/src/output.ts used whenever the global --format csv option is passed, whose escapeCsv helper only handles RFC 4180 delimiter, quote, and newline escaping and does not neutralize standard CSV formula-injection prefixes. Any CLI command that streams an object array containing user-controlled strings, including transactions list, accounts list, payees list, categories list, tags list, category-groups list, rules list, schedules list, and query, can emit cells that auto-evaluate when the resulting CSV is opened in Excel, LibreOffice Calc, or Google Sheets, enabling data exfiltration and arbitrary formula execution. This issue is fixed in version 26.6.0.

Risk And Classification

Primary CVSS: v3.1 4.6 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Problem Types: CWE-1236 | CWE-1236 CWE-1236: Improper Neutralization of Formula Elements in a CSV File

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.6MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.1CNADECLARED4.6MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Actualbudget Actual affected < 26.6.0 Not specified

References

ReferenceSourceLinkTags
github.com/actualbudget/actual/security/advisories/GHSA-7gh7-258j-4mpq 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/actualbudget/actual/pull/7859 [email protected] github.com
github.com/actualbudget/actual/releases/tag/v26.6.0 [email protected] github.com
github.com/actualbudget/actual/commit/068185751c03b42e726e3c60b718413d5f... [email protected] github.com
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