CVE-2026-67332@better-auth/oauth-provider before 1.7.0-beta.4 Authorization Bypass
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No exploitation reported and no EPSS estimate yet.
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@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 audience targets resource servers the authorization never covered, bypassing intended authorization boundaries.
- CVSS
- 6.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-285
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
better-auth oauth-provider better_auth:oauth_provider (from the name) | from 1.4.8 before 1.7.0-beta.4; 1.7.0-beta.4 not affected | CNA record |
References
- https://github.com/better-auth/better-auth/security/advisories/GHSA-p2fr-6hmx-4528vendor-advisory
- https://www.vulncheck.com/advisories/better-auth-oauth-provider-before-beta-4-authorization-bypassthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.