medium6.9
CVE-2026-42604
Actual is a local-first personal finance tool.
Impact
Actual is a local-first personal finance tool. The `POST /openid/config` endpoint in Actual Budget's sync-server versions <= 26.4.0 exposes the full OpenID Connect configuration—including the OAuth2 `client_secret`—to any caller who knows the bootstrap password. The endpoint also lacks authentication and rate limiting, making the bootstrap password brute-forceable. Version 26.5.0 fixes the issue.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Actual Budget | Actual Budget'S Sync-Server | through 26.4.0 |
Versions were read from the advisory text. No structured product data has been published for this record yet.