Description
Applications that use the verifyWebhook() helper to verify incoming Clerk webhooks are susceptible to accepting improperly signed webhook events.
Recommendation
Update the @clerk/react-router package to the latest compatible version. Followings are version details:
- Affected version(s): >= 1.5.0, < 1.6.4
- Patched version(s): 1.6.4
References
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- @clerk/backend Performs Insufficient Verification of Data Authenticity - CVE-2025-53548


