Vulnerability Description
`@bsv/wallet-toolbox` provides BRC-100 wallet signing and storage components, while `@bsv/wallet-toolbox-client` and `@bsv/wallet-toolbox-mobile` provide client-focused distributions for standard and mobile applications using wallet storage services. A vulnerability in these packages causes transactions created through a remote `StorageClient` to trust output locking scripts returned by the storage provider without verifying that they match the outputs requested by the caller. A malicious or compromised storage provider can substitute a recipient script or inject an additional output, causing the wallet to sign and broadcast a transaction that redirects funds while the application and user interface continue to display the intended recipient. Source and npm publication history indicate that stable versions `@bsv/wallet-toolbox` and `@bsv/wallet-toolbox-client` from 1.1.47 through 2.3.3, and `@bsv/wallet-toolbox-mobile` from its initial 1.3.21 release through 2.3.3, are affected. All three packages are patched in version 2.4.0. Applications unable to upgrade should avoid remote `StorageClient` providers, use local storage, or independently verify every transaction output’s locking script and value against the original request before signing
Related Weaknesses (CWE)
References
- https://github.com/bsv-blockchain/ts-stack/commit/3a11f6111919245a3090e9f3895cfc
- https://github.com/bsv-blockchain/ts-stack/commit/5492cabbef4ddc7f60cc49cdf5d8c7
- https://github.com/bsv-blockchain/ts-stack/commit/5ee60395e78e8b822d9a78efeacc60
- https://github.com/bsv-blockchain/ts-stack/security/advisories/GHSA-36f9-7rg5-cp
- https://github.com/bsv-blockchain/wallet-toolbox/commit/ca651b067c0238cd8b1ddd3a
- https://github.com/bsv-blockchain/ts-stack/security/advisories/GHSA-36f9-7rg5-cp
FAQ
What is CVE-2026-56744?
CVE-2026-56744 is a documented vulnerability. `@bsv/wallet-toolbox` provides BRC-100 wallet signing and storage components, while `@bsv/wallet-toolbox-client` and `@bsv/wallet-toolbox-mobile` provide client-focused distributions for standard and ...
How severe is CVE-2026-56744?
CVSS scoring is not yet available for CVE-2026-56744. Check NVD for updates.
Is there a patch for CVE-2026-56744?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.