CVE-2026-67332

Medium

Description

@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.

SeverityMedium

CVSS6.4

Exploit probability—

Product@better-auth/oauth-provider

PublishedAug 1, 2026

First seenAug 1, 2026

Weakness typeCWE-285CWE-285

How to fix

Update

@better-auth/oauth-provider1.7.0-beta.4 or later

Vendor advisories

github.com/better-auth/better-auth/security/advisories/GHSA-p2fr-6hmx-4528

Affected products

Product	Affected versions	Fixed in
@better-auth/oauth-providernpm	1.4.8 ≤ v < 1.7.0-beta.4	1.7.0-beta.4

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