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4 vulnerabilities found for oauth-provider by better-auth
CVE-2026-67332 (GCVE-0-2026-67332)
Vulnerability from nvd – Published: 2026-08-01 12:22 – Updated: 2026-08-03 18:32
VLAI
EPSS
VEX
Title
@better-auth/oauth-provider before 1.7.0-beta.4 Authorization Bypass
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.
Severity
6.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 18:31 UTC
CWE
- CWE-285 - Improper Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | oauth-provider |
Affected:
1.4.8 , < 1.7.0-beta.4
(semver)
Unaffected: 1.7.0-beta.4 (semver) cpe:2.3:a:better-auth:better-auth\/oauth-provider:*:*:*:*:*:node.js:*:* |
Date Public
2026-05-31 00:00
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CVE-2026-41427 (GCVE-0-2026-41427)
Vulnerability from nvd – Published: 2026-04-24 19:23 – Updated: 2026-04-27 13:42
VLAI
EPSS
VEX
Title
Better Auth OAuth 2.1 Provider: Unprivileged users can register OAuth clients
Summary
Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.5, the clientPrivileges option documents a create action, but the OAuth client creation endpoints did not invoke the hook before persisting new clients. Deployments that configured clientPrivileges to restrict client registration were not actually restricted — any authenticated user could reach the create endpoints and register an OAuth client with attacker-chosen redirect URIs and metadata. This vulnerability is fixed in 1.6.5.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-27 13:42 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | x_refsource_CONFIRM |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
>= 1.4.8-beta.7, < 1.6.5
Affected: >= 1.7.0-beta.0, <= 1.7.0-beta.1 |
|
| better-auth | oauth-provider |
Affected:
>= 1.4.8-beta.7, < 1.6.5
Affected: >= 1.7.0-beta.0, <= 1.7.0-beta.1 |
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CVE-2026-67332 (GCVE-0-2026-67332)
Vulnerability from cvelistv5 – Published: 2026-08-01 12:22 – Updated: 2026-08-03 18:32
VLAI
EPSS
VEX
Title
@better-auth/oauth-provider before 1.7.0-beta.4 Authorization Bypass
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.
Severity
6.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 18:31 UTC
CWE
- CWE-285 - Improper Authorization
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/better-auth-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | oauth-provider |
Affected:
1.4.8 , < 1.7.0-beta.4
(semver)
Unaffected: 1.7.0-beta.4 (semver) cpe:2.3:a:better-auth:better-auth\/oauth-provider:*:*:*:*:*:node.js:*:* |
Date Public
2026-05-31 00:00
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CVE-2026-41427 (GCVE-0-2026-41427)
Vulnerability from cvelistv5 – Published: 2026-04-24 19:23 – Updated: 2026-04-27 13:42
VLAI
EPSS
VEX
Title
Better Auth OAuth 2.1 Provider: Unprivileged users can register OAuth clients
Summary
Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.5, the clientPrivileges option documents a create action, but the OAuth client creation endpoints did not invoke the hook before persisting new clients. Deployments that configured clientPrivileges to restrict client registration were not actually restricted — any authenticated user could reach the create endpoints and register an OAuth client with attacker-chosen redirect URIs and metadata. This vulnerability is fixed in 1.6.5.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-27 13:42 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/better-auth/better-auth/securi… | x_refsource_CONFIRM |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| better-auth | better-auth |
Affected:
>= 1.4.8-beta.7, < 1.6.5
Affected: >= 1.7.0-beta.0, <= 1.7.0-beta.1 |
|
| better-auth | oauth-provider |
Affected:
>= 1.4.8-beta.7, < 1.6.5
Affected: >= 1.7.0-beta.0, <= 1.7.0-beta.1 |
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"name": "https://github.com/better-auth/better-auth/security/advisories/GHSA-xr8f-h2gw-9xh6",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-xr8f-h2gw-9xh6"
}
],
"source": {
"advisory": "GHSA-xr8f-h2gw-9xh6",
"discovery": "UNKNOWN"
},
"title": "Better Auth OAuth 2.1 Provider: Unprivileged users can register OAuth clients"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-41427",
"datePublished": "2026-04-24T19:23:20.161Z",
"dateReserved": "2026-04-20T15:32:33.814Z",
"dateUpdated": "2026-04-27T13:42:23.885Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}