Missing Authentication for Critical Function Affecting @actual-app/sync-server package, versions <26.2.1
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published25 Feb 2026
- disclosed24 Feb 2026
- creditStephen White
Introduced: 24 Feb 2026
NewCVE-2026-27584 (opens in a new tab)How to fix?
Upgrade @actual-app/sync-server to version 26.2.1 or higher.
Overview
@actual-app/sync-server is an actual syncing server
Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the SimpleFIN and PluggyAI integration endpoints. An attacker can access sensitive bank account balances and transaction information by sending unauthenticated requests to the affected endpoints over the network.
Note:
This is only exploitable if the SimpleFIN or Pluggy.ai integrations are configured and the server is accessible over the network.