Vulnerability library
Security checkAugust 20, 2025

x402 SDK vulnerable in outdated versions in resource servers for builders - x402

Understand the exposure, see the recommended fix, and check whether your own website has related weaknesses.

High severitynpmx402

Check your website

Find this and other vulnerabilities with a free scan.

Your scan runs on your computer. No account required.

Description

There is a security vulnerability in outdated versions of the x402 SDK. This does not directly affect users’ keys, smart contracts, or funds.

This primarily impacts builders working on resource servers.

Recommendation

Update the x402 package to the latest compatible version. Followings are version details:

  • Affected version(s): < 0.5.2
  • Patched version(s): 0.5.2

References

Could your website be exposed too?

SmartScanner can check your website for x402 SDK vulnerable in outdated versions in resource servers for builders - x402 and gives you actionable findings to investigate.

Start a free scan

Related Issues

See something that needs correcting? Let us knowUpdated August 20, 2025