{"id":"CVE-2026-56744","title":"`@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 stor…","summary":"`@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 stor…","severity":"high","cvss":8.7,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-1288"],"vendor":"bsv-blockchain","product":"@bsv/wallet-toolbox","affected":["@bsv/wallet-toolbox >= 1.1.47, < 2.4.0","@bsv/wallet-toolbox-client >= 1.1.47, < 2.4.0","@bsv/wallet-toolbox-mobile >= 1.3.21, < 2.4.0"],"published":"2026-09-24","updated":"2026-09-24","sourceUpdated":"2026-09-24T17:17:05.047","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-56744","references":[{"url":"https://github.com/bsv-blockchain/ts-stack/commit/3a11f6111919245a3090e9f3895cfc4f21a80d28","label":"security-advisories@github.com"},{"url":"https://github.com/bsv-blockchain/ts-stack/commit/5492cabbef4ddc7f60cc49cdf5d8c74ed2e5d949","label":"security-advisories@github.com"},{"url":"https://github.com/bsv-blockchain/ts-stack/commit/5ee60395e78e8b822d9a78efeacc6039c249819b","label":"security-advisories@github.com"},{"url":"https://github.com/bsv-blockchain/ts-stack/security/advisories/GHSA-36f9-7rg5-cpf8","label":"security-advisories@github.com"},{"url":"https://github.com/bsv-blockchain/wallet-toolbox/commit/ca651b067c0238cd8b1ddd3af225daa503857a07","label":"security-advisories@github.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56744"},{"url":"https://github.com/advisories/GHSA-36f9-7rg5-cpf8"}],"tags":["nvd","cve.org","ghsa","npm"],"cvssSource":"cna","ingestedAt":"2026-09-24T17:48:30.384Z","aliases":["GHSA-36f9-7rg5-cpf8"],"ecosystem":"npm","patched":["@bsv/wallet-toolbox 2.4.0","@bsv/wallet-toolbox-client 2.4.0","@bsv/wallet-toolbox-mobile 2.4.0"],"slug":"CVE-2026-56744","body":"## Overview\n\n`@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\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-56744)\n\nAffected packages:\n\n- `@bsv/wallet-toolbox >= 1.1.47, < 2.4.0`\n- `@bsv/wallet-toolbox-client >= 1.1.47, < 2.4.0`\n- `@bsv/wallet-toolbox-mobile >= 1.3.21, < 2.4.0`\n\nPatched in:\n\n- `@bsv/wallet-toolbox 2.4.0`\n- `@bsv/wallet-toolbox-client 2.4.0`\n- `@bsv/wallet-toolbox-mobile 2.4.0`\n\nSource: https://github.com/advisories/GHSA-36f9-7rg5-cpf8","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}