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High

`@bsv/wallet-toolbox` / `-client` / `-mobile` don't verify storage-supplied recipient output scripts against caller-requested outputs in createAction (can redirect payments when using remote storage)

Type: advisorySource: Official CVE List1 source record

`@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

Announced Source revision 1
Original source ↗

CVE-2026-56744

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-56744

@bsv/wallet-toolbox

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

@bsv/wallet-toolbox-client

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

@bsv/wallet-toolbox-mobile

Source reference: /containers/cna/affected/2/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "bsv-blockchain",
    "product": "@bsv/wallet-toolbox",
    "versions": [
      {
        "status": "affected",
        "version": ">= 1.1.47, < 2.4.0"
      }
    ]
  },
  {
    "vendor": "bsv-blockchain",
    "product": "@bsv/wallet-toolbox-client",
    "versions": [
      {
        "status": "affected",
        "version": ">= 1.1.47, < 2.4.0"
      }
    ]
  },
  {
    "vendor": "bsv-blockchain",
    "product": "@bsv/wallet-toolbox-mobile",
    "versions": [
      {
        "status": "affected",
        "version": ">= 1.3.21, < 2.4.0"
      }
    ]
  }
]
Related CVEs
CVE-2026-56744

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Linked CVE context

These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.

CVE-2026-56744 · High

@bsv/wallet-toolbox, @bsv/wallet-toolbox-client, @bsv/wallet-toolbox-mobile

Event
#3238 · Revision 1
Added to Heist Feed
Publisher date
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