CVE-2026-111639
CVE-2026-111639 · bbs-go through 4.4.6 Account Takeover via Google One Tap Login
Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.
bbs-go through 4.4.6 contains an authentication bypass vulnerability in the /api/login/google_one_tap endpoint that allows remote attackers to log in as other users by submitting Google ID tokens issued to any OAuth client. Attackers operating their own Google OAuth client can capture a victim's Google-signed ID token and replay it, since the aud claim is never checked, to obtain an authenticated session as the victim's Google-linked account.
CVSS 8.6 · Élevée · EPSS 0,5%
- Publication
- Mise à jour
Produits et versions concernés
bbs-go
- Versions du logiciel
- ≥ 0, ≤ 4.4.6: Concernée (custom)
Aucun correctif publié
Sources originales
- https://hackmd.io/@hieuPenguinnn/bbs-go-google-one-tap-id-token-audience-confusion-account-takeover
- https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/pkg/google/jwt.go#L55-L58
- https://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/services/third_user_service.go#L274-L293
- https://www.vulncheck.com/advisories/bbs-go-through-4.4.6-account-takeover-via-google-one-tap-login
- https://nvd.nist.gov/vuln/detail/CVE-2026-111639