CVE-2026-57449
CVE-2026-57449 · Actual Sync Server: CORS Proxy GitHub API Allowlist Prefix Bypass Leaks Private Repositories Through the Server GitHub Token
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Actual is a local-first personal finance tool. Prior to 26.7.0, Actual Sync Server's CORS proxy is intended to let authenticated users fetch resources only from repositories listed in the official plugin allowlist. When `ACTUAL_GITHUB_TOKEN` is configured, the proxy automatically attaches the server's GitHub token to GitHub requests. The GitHub API allowlist check uses a raw `startsWith()` prefix test for `/repos/{owner}/{repo}` without requiring a path boundary after the repository name. If an allowlisted public plugin repository is `https://github.com/acme/plugin`, the proxy also accepts GitHub API URLs. Those URLs are outside the allowlisted repository but still pass because their API path starts with `/repos/acme/plugin`. The proxy then forwards the request with the server's `ACTUAL_GITHUB_TOKEN`, allowing any authenticated Actual user to read private GitHub resources reachable by that token. Version 26.7.0 fixes the issue.
CVSS 7.1 · Élevée · EPSS 0,3% · Code d’exploitation public · Correctif disponible
- Publication
- Mise à jour
Pile logicielle: node
Produits et versions concernés
actual
- Versions du logiciel
- < 26.7.0: Concernée
Aucun correctif publié
@actual-app/sync-server npm
- Plages de versions concernées
- SEMVER: < 26.7.0
Mettez à jour vers 26.7.0