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Outdated x402 SDK on Solana Resource Servers Exposes Payment Risk
Summary
If you run a resource server on Solana that processes payments, you need to update the x402 SDK to the latest version to prevent potential issues with transactions. This update is only necessary if your server is also a facilitator. Clients and facilitators who don't run their own servers are not affected and don't need to take action.
What to do
- Update x402 @x402/svm to version 2.6.0.
- Update x402 to version 2.3.0.
- Update coinbase github.com/coinbase/x402/go to version 2.5.0.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| x402 | @x402/svm | <= 2.6.0 | 2.6.0 |
| – | x402 | <= 2.3.0 | 2.3.0 |
| coinbase | github.com/coinbase/x402/go | <= 2.5.0 | 2.5.0 |
Original title
x402 SDK Security Advisory
Original description
### Impact
A security vulnerability exists in outdated versions of the x402 SDK.
This vulnerability does not affect users' private keys, smart contracts, or funds.
The issue impacts resource servers accepting payments on Solana when the facilitator is running a vulnerable version of the x402 SDK.
### Who Should Take Action
Facilitators that process payments on Solana must upgrade the x402 SDK to the patched versions listed below.
Clients are not required to upgrade.
Resource servers are not required to upgrade unless they operate their own facilitator (self-facilitate).
### Patches
Please update to the following package versions:
* Npm: @x402/svm >= 2.6.0
* Pypi: x402 >= 2.3.0
* Go: x402 >= 2.5.0
A security vulnerability exists in outdated versions of the x402 SDK.
This vulnerability does not affect users' private keys, smart contracts, or funds.
The issue impacts resource servers accepting payments on Solana when the facilitator is running a vulnerable version of the x402 SDK.
### Who Should Take Action
Facilitators that process payments on Solana must upgrade the x402 SDK to the patched versions listed below.
Clients are not required to upgrade.
Resource servers are not required to upgrade unless they operate their own facilitator (self-facilitate).
### Patches
Please update to the following package versions:
* Npm: @x402/svm >= 2.6.0
* Pypi: x402 >= 2.3.0
* Go: x402 >= 2.5.0
Published: 7 Mar 2026 · Updated: 13 Mar 2026 · First seen: 7 Mar 2026