CVE-2026-111639
bbs-go through 4.4.6 contains an authentication bypass vulnerability in the /api/login/google_one_tap endpoint that allows remote attackers
CVSS
8.1
Alto
EPSS
0.4%
p30
KEV
—
Exploit Today
9
0-100
Publicado: 16 oct 2026 · Última mod.: 16 oct 2026 · CWE-287
0.4%EPSS · 30 días0.4%
2026-10-172026-10-20
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.
- github.comhttps://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/pkg/google/jwt.go#L55-L58
- github.comhttps://github.com/mlogclub/bbs-go/blob/v4.4.6/internal/services/third_user_service.go#L274-L293
- hackmd.iohttps://hackmd.io/@hieuPenguinnn/bbs-go-google-one-tap-id-token-audience-confusion-account-takeover
- www.vulncheck.comhttps://www.vulncheck.com/advisories/bbs-go-through-4.4.6-account-takeover-via-google-one-tap-login
CVECVSSEPSSKEVRExplotTítuloVis.
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——1A failure has been identified in the SNS during dynamic data files signature check.
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