CVE-2026-58399
CVE-2026-58399 · @acastellon/auth has an authentication bypass via spoofable headers in validateToken()
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@acastellon/auth is an authentication control system for microservices. Versions prior to 2.3.0 appear to allow an unauthenticated authentication bypass in validateToken() through spoofable auth-user and Host request headers. The validateToken middleware contains a service-to-service bypass for auth-user: service-brother when req.get('host').startsWith(getHostName()). Both values involved in the check can be influenced by an unauthenticated HTTP client: auth-user is a request header, and Host is also client-controlled. As a result, a remote unauthenticated attacker can send a request with crafted headers and bypass token validation before the normal legacy/JWT/OIDC validation logic runs. A fix has been implemented in v2.3.0.
CVSS 8.7 · Élevée · EPSS 1,0% · Correctif disponible
- Publication
- Mise à jour
Pile logicielle: node
Produits et versions concernés
module-auth
- Versions du logiciel
- < 2.3.0: Concernée
Aucun correctif publié
@acastellon/auth npm
- Plages de versions concernées
- SEMVER: < 2.3.0
Mettez à jour vers 2.3.0