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OpenAdvisories
Critical · 9.2 CVE-2026-27584 EUVD-2026-8526GHSA-m2cq-xjgm-f668

ActualBudget server is Missing Authentication for SimpleFIN and Pluggy AI bank sync endpoints

Published Feb 24, 2026 · Updated Feb 27, 2026 · Assigned by GitHub_M

Description

Actual is a local-first personal finance tool. Prior to version 26.2.1, missing authentication middleware in the ActualBudget server component allows any unauthenticated user to query the SimpleFIN and Pluggy.ai integration endpoints and read sensitive bank account balance and transaction information. This vulnerability allows an unauthenticated attacker to read the bank account balance and transaction history of ActualBudget users. This vulnerability impacts all ActualBudget Server users with the SimpleFIN or Pluggy.ai integrations configured. The ActualBudget Server instance must be reachable over the network. Version 26.2.1 patches the issue.

Affected products

VendorProductAffectedFixed
actualbudget actual < 26.2.1 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm @actual-app/sync-server < 26.2.1 26.2.1 GHSA-m2cq-xjgm-f668

References