CVE-2026-27638

The record

Actual is a local-first personal finance tool. Prior to version 26.2.1, in multi-user mode (OpenID), the sync API endpoints (`/sync/*`) don't verify that the authenticated user owns or has access to the file being operated on. Any authenticated user can read, modify, and overwrite any other user's budget files by providing their file ID. Version 26.2.1 patches the issue.

Affected packages

Related vulnerabilities

• GHSA-qmjj-p7m9-wjrv @actual-app/sync-server: Missing authorization in sync endpoints allows cross-user budget… Same vulnerability
• CVE-2026-33318 Actual is a local-first personal finance tool. Also affects @actual-app/sync-server
• GHSA-prp4-2f49-fcgp Actual has Privilege Escalation via 'change-password' Endpoint on OpenID-Migrated Servers Also affects @actual-app/sync-server
• GHSA-27vg-33gh-4hwg Actual Sync Server has an Authenticated Path Traversal Also affects @actual-app/sync-server
• CVE-2026-3089 Actual Sync Server allows authenticated users to upload files through POST… Also affects @actual-app/sync-server
• GHSA-m2cq-xjgm-f668 ActualBudget server is Missing Authentication for SimpleFIN and Pluggy AI bank sync… Also affects @actual-app/sync-server
• CVE-2026-27584 Actual is a local-first personal finance tool. Also affects @actual-app/sync-server
• CVE-2026-96391 Missing Authorization vulnerability in Drupal Webform REST allows Forceful Browsing. CWE-862