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Outdated x402 SDK on Solana Resource Servers
Summary
Facilitators processing payments on Solana must update the x402 SDK to prevent potential issues. This update affects resource servers, but not clients. The update is necessary to ensure secure payment processing on Solana.
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A security vulnerability exists in outdated versions of the x402 SDK.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A security vulnerability exists in outdated versions of the x402 SDK.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