CVE Catalog

CVE-2026-67332

MediumCVSS 6.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.26%

17th percentile - higher than 17% of all known CVEs

Summary

@better-auth/oauth-provider before version 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.

Risk Assessment

The risk involves the possibility of gaining access to unauthorized resources through tokens with expanded audience, potentially leading to data confidentiality breaches and unauthorized actions.

Recommendation

It is recommended to update @better-auth/oauth-provider to version 1.7.0-beta.4 or later.

Related vulnerabilities

Original NVD description (English source)

@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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS