HIGHVulnerability
Verified
Global

NVD HIGH: CVE-2026-67333 — better-auth before 1.6.13 (and pre-release builds 1.7.0-beta.0 through 1.7.0-bet...

·Source: NIST NVD

Updated:

Executive Summary

better-auth before 1.6.13 (and pre-release builds 1.7.0-beta.0 through 1.7.0-beta.3) fail to validate the scheme of redirect_uris registered via the deprecated oidc-provider plugin and the mcp plugin (which wraps the same provider). An attacker can register an OAuth client with a javascript: redirect_uri, which the authorization server later returns unchanged in the consent response. If the deploy

Analysis

better-auth before 1.6.13 (and pre-release builds 1.7.0-beta.0 through 1.7.0-beta.3) fail to validate the scheme of redirect_uris registered via the deprecated oidc-provider plugin and the mcp plugin (which wraps the same provider). An attacker can register an OAuth client with a javascript: redirect_uri, which the authorization server later returns unchanged in the consent response. If the deployment's consent page navigates the browser to the returned redirectURI (e.g. assigning it to window.location.href), the attacker's JavaScript executes in the authorization-server origin, exposing the victim's session and enabling account takeover. CVSS Score: 7.2. Published: 2026-08-01T13:17:04.123.

Indicators of Compromise (1)

CVE (1)
CVE-2026-67333
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Aug 1, 2026. Verified by: NIST.

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