CVE-2026-67332 json
@better-auth/oauth-provider before 1.7.0-beta.4 Authorization Bypass
published 2026-07-07 4 mo ago modified 2026-10-23 16 d ago also GHSA-p2fr-6hmx-4528 , EUVD-2026-51836
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 17%
- public exploits
- 0
- none known
Summary
@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.
Patch / fix
- npm @better-auth/oauth-provider 1.7.0-beta.4
- better-auth oauth-provider 1.7.0-beta.4
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 17% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N |
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| GitHub | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @better-auth/oauth-provider | >=1.4.8, <1.7.0-beta.4 |
1.7.0-beta.4 |
Affected products
- better-auth oauth-provider
Classification
References
-
github.com
/better-auth/better-auth/security/advisories/GHSA-p2fr-6hmx-4528
vendor-advisory, web
-
vulncheck.com
/advisories/better-auth-oauth-provider-before-beta-4-authorization-bypass
third-party-advisory
-
github.com
/better-auth/better-auth
package
-
github.com
/better-auth/better-auth/releases/tag/v1.7.0-beta.4
web
Sources
- CVE List CVE-2026-67332
- GitHub Advisory GHSA-p2fr-6hmx-4528
- NVD CVE-2026-67332
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.