What is CVE-2026-67332?

CVE-2026-67332 is a medium-severity vulnerability in Better-auth Oauth-provider, classified under Improper Authorization. CVSS score: 6.4/10. Published 2026-08-01.

How severe is CVE-2026-67332?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Auth bypass in Better-auth Oauth-provider

CVE-2026-67332

@better-auth/oauth-provider before 1.7.0-beta.4 fails to bind access-token audience to the authorization grant, allowing clients to request tokens for unrelated resources. Attackers can complete an OAuth flow and obtain access tokens whose…

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Better-auth Oauth-provider — versions 1.4.8, 1.7.0-beta.4

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-67332?: CVE-2026-67332 is a medium-severity vulnerability in Better-auth Oauth-provider, classified under Improper Authorization. CVSS score: 6.4/10. Published 2026-08-01.
How severe is CVE-2026-67332?: Medium severity. CVSS v3 base score is 6.4 out of 10.