CVE-2026-53513— Better Auth: Server-side request forgery via unvalidated OIDC endpoints on @better-auth/sso provider registration
Possible ATT&CK Techniques 2AI
T1098 · Account Manipulation T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| @better-auth | sso | >= 0.1.0, < 1.6.11 | affected |
| better-auth | better-auth | >= 0.1.0, < 1.6.11 | affected |
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I. Basic Information for CVE-2026-53513
Vulnerability Information
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Vulnerability Title
Better Auth: Server-side request forgery via unvalidated OIDC endpoints on @better-auth/sso provider registration
Source: CVE Program / CVE List V5
Vulnerability Description
Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, the @better-auth/sso plugin's POST /sso/register and POST /sso/update-provider endpoints accept attacker-controlled oidcConfig.userInfoEndpoint, tokenEndpoint, and jwksEndpoint URLs when skipDiscovery: true is set, store them on the ssoProvider row without origin validation, and fetch them during OIDC callback, allowing non-blind server-side request forgery and possible account linking when trustEmailVerified: true is configured. This issue is fixed in version 1.6.11.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Better Auth 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
better-auth Better Auth是better-auth个人开发者开源的一个框架无关认证框架。 Better Auth 1.6.11之前版本存在安全漏洞，该漏洞源于输入验证错误，当设置skipDiscovery: true时，@better-auth/sso插件接受攻击者控制的oidcConfig.userInfoEndpoint、tokenEndpoint和jwksEndpoint URLs，存储时未进行来源验证，并在OIDC回调时调用，可能导致非盲服务端请求伪造，当配置trustEmai
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| better-auth | better-auth | >= 0.1.0, < 1.6.11 | - | |
| @better-auth | sso | >= 0.1.0, < 1.6.11 | - |
II. Public POCs for CVE-2026-53513
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7683 chars
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III. Intelligence Information for CVE-2026-53513
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Patches & Fixes for CVE-2026-53513 (1)
Vendor Advisories for CVE-2026-53513 (1)
Vendor Pages for CVE-2026-53513 (1)
Same Patch Batch · better-auth · 2026-07-15 · 8 CVEs total
| CVE-2026-53516 | 8.3 HIGH | Better Auth: Account takeover via OAuth auto-link to unverified pre-registered email |
| CVE-2026-53517 | 8.1 HIGH | Better Auth OAuth Provider: Refresh Token Rotation Race Condition Allows Concurrent Replay |
| CVE-2026-53514 | 7.7 HIGH | Better Auth: Unauthorized invitation acceptance via unverified email match in organization |
| CVE-2026-45337 | 7.6 HIGH | Better Auth: Device authorization approve and deny accept any authenticated session while |
| CVE-2026-53515 | 7.1 HIGH | Better Auth: Privilege escalation via SSO provider registration: missing admin role check |
| CVE-2026-53518 | Better Auth OAuth Provider: Race Condition in Authorization Code Exchange Enables Multi-Us | |
| CVE-2026-53512 | Better Auth: OAuth refresh-token replay via missing client authentication on oidc-provider |
IV. Related Vulnerabilities
Same product: better-auth
- CVE-2025-71401
better-auth before 1.4.1 basePath Modification DoS - CVE-2025-71399
Better Auth before 1.4.4 Path Normalization Bypass via rou3 - CVE-2026-67337
better-auth before 1.4.9 Two-Factor Authentication Bypass vi - CVE-2026-67327
better-auth before 1.6.22 Account Takeover via Magic-Link Em - CVE-2026-67333
better-auth before 1.6.13 Stored XSS via javascript redirect
Same vendor: better-auth
- CVE-2025-71401
better-auth before 1.4.1 basePath Modification DoS - CVE-2025-71400
better-auth passkey before 1.4.0 IDOR via delete-passkey - CVE-2025-71399
Better Auth before 1.4.4 Path Normalization Bypass via rou3 - CVE-2026-67327
better-auth before 1.6.22 Account Takeover via Magic-Link Em - CVE-2026-67329
@better-auth/stripe before 1.6.21 Authorization Bypass via O
Same weakness: CWE-20
- CVE-2026-59650
MTI/A0 DH agreement exponentiates unvalidated peer value - CVE-2025-71399
Better Auth before 1.4.4 Path Normalization Bypass via rou3 - CVE-2026-67326
GitPython before 3.1.50 Newline Injection via config_writer - CVE-2026-67296
FreeRDP before 3.29.0 Denial of Service via RDPEI PDU - CVE-2026-67330
better-auth SCIM 1.4.0-beta.27 through 1.6.21 Account Takeov
V. Comments for CVE-2026-53513
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