HIGHnpm

Better Auth has stored XSS in the auth-server origin via javascript: redirect_uri in oidc-provider and mcp

Better Auth has stored XSS in the auth-server origin via javascript: redirect_uri in oidc-provider and mcp

CVE-2026-67333Published 4 weeks agoUpdated 3 days agoSource: OSV

Affected packages

  • better-auth

Exploit signal

Known exploited (CISA KEV)
No
EPSS score
0.16%
EPSS percentile
5.4%

EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs. This advisory is in the top 5%.

Better Auth has stored XSS in the auth-server origin via javascript: redirect_uri in oidc-provider and mcp | HackTribune