Home

Description

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.

PUBLISHED Reserved 2026-04-20 | Published 2026-04-24 | Updated 2026-04-27 | Assigner GitHub_M




HIGH: 7.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N

Problem types

CWE-863: Incorrect Authorization

Product status

>= 1.4.8-beta.7, < 1.6.5
affected

>= 1.7.0-beta.0, <= 1.7.0-beta.1
affected

>= 1.4.8-beta.7, < 1.6.5
affected

>= 1.7.0-beta.0, <= 1.7.0-beta.1
affected

References

github.com/...r-auth/security/advisories/GHSA-xr8f-h2gw-9xh6

cve.org (CVE-2026-41427)

nvd.nist.gov (CVE-2026-41427)

Download JSON