CVE-2026-67332
MEDIUM@better-auth/oauth-provider before 1.7.0-beta.4 Authorization Bypass
Title source: cnaDescription
@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.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
GitHub Security Advisory (GHSA-p2fr-6hmx-4528)
https://github.com/better-auth/better-auth/security/advisories/GHSA-p2fr-6hmx-4528
Third Party Advisory third-party-advisory
VulnCheck Advisory: @better-auth/oauth-provider before 1.7.0-beta.4 Authorization Bypass
https://www.vulncheck.com/advisories/better-auth-oauth-provider-before-beta-4-authorization-bypass
Scores
CVSS v3
6.4
EPSS
0.0016
EPSS Percentile
5.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-285
Status
published
Products (2)
better-auth/oauth-provider
1.4.8 - 1.7.0-beta.4
better-auth/oauth-provider
1.7.0-beta.4
Published
Aug 01, 2026
Tracked Since
Aug 01, 2026