@clerk/backend Performs Insufficient Verification of Data Authenticity

Description

Applications that use the verifyWebhook() helper to verify incoming Clerk webhooks are susceptible to accepting improperly signed webhook events.

Recommendation

Update the @clerk/tanstack-react-start package to the latest compatible version. Followings are version details:

• Affected version(s): >= 0.16.0, < 0.18.3
• Patched version(s): 0.18.3

References

• GHSA-9mp4-77wg-rwx9
• CVE-2025-53548
• CWE-345
• CAPEC-310
• OWASP 2021-A6
• OWASP 2021-A8

Related Issues

• @clerk/backend Performs Insufficient Verification of Data Authenticity - @clerk/remix - CVE-2025-53548
• @clerk/backend Performs Insufficient Verification of Data Authenticity - @clerk/astro - CVE-2025-53548
• @clerk/backend Performs Insufficient Verification of Data Authenticity - @clerk/react-router - CVE-2025-53548
• @clerk/backend Performs Insufficient Verification of Data Authenticity - @clerk/backend - CVE-2025-53548

You might also like:

How to Secure your NodeJs Express Javascript Application - part 1

How to Secure your NodeJs Express Javascript Application - part 2

10 Secure Coding Best Practices to Follow in Every Project

Tags:

npm

@clerk/tanstack-react-start