CVE-2026-53513
CRITICALBetter Auth: Server-side request forgery via unvalidated OIDC endpoints on @better-auth/sso provider registration
Title source: cnaDescription
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.
References (4)
Core 4
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/better-auth/better-auth/security/advisories/GHSA-5rr4-8452-hf4v
X_Refsource_Misc x_refsource_misc
https://github.com/better-auth/better-auth/pull/9574
X_Refsource_Misc x_refsource_misc
https://github.com/better-auth/better-auth/commit/37f60cb176cb53147da7dfd5ec15afa5b486e81e
X_Refsource_Misc x_refsource_misc
https://github.com/better-auth/better-auth/releases/tag/v1.6.11
Scores
CVSS v3
9.6
EPSS
0.0025
EPSS Percentile
16.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-20
CWE-345
CWE-441
CWE-918
Status
published
Products (5)
@better-auth/sso
>= 0.1.0, < 1.6.11
better-auth/better-auth
>= 0.1.0, < 1.6.11
better-auth/better-auth\/sso
< 1.6.11
better-auth/better_auth
0.1.0 - 1.6.11
better-auth/sso
0.1.0 - 1.6.11npm
Published
Jul 15, 2026
Tracked Since
Jul 15, 2026