Incorrect Authorization Affecting @actual-app/sync-server package, versions <26.5.0
Threat Intelligence
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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- published7 Jul 2026
- disclosed12 Jun 2026
- creditjfdoming
Introduced: 12 Jun 2026
CVE-2026-42604 (opens in a new tab)How to fix?
Upgrade @actual-app/sync-server to version 26.5.0 or higher.
Overview
@actual-app/sync-server is an actual syncing server
Affected versions of this package are vulnerable to Incorrect Authorization through the /openid/config endpoint, which exposes sensitive OpenID Connect configuration data, including the OAuth2 client_secret, to any caller who knows the bootstrap password. The endpoint lacks authentication and rate limiting, allowing an attacker to obtain confidential credentials by brute-forcing the bootstrap password.