CVE-2026-27638
ActualBudget missing authorization in sync endpoints allows cross-user budget file access in multi-user mode
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | actualbudget |
| Product | actual |
| Published | Feb 26, 2026 |
| Last Updated | Mar 2, 2026 |
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Affected Versions
actualbudget / actual
< 26.2.1