{"id":"CVE-2026-56744","sourceIdentifier":"security-advisories@github.com","published":"2026-09-24T17:17:05.047","lastModified":"2026-09-30T19:57:08.043","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"`@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"}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"bsv-blockchain","product":"@bsv/wallet-toolbox","versions":[{"version":">= 1.1.47, < 2.4.0","status":"affected"}]},{"vendor":"bsv-blockchain","product":"@bsv/wallet-toolbox-client","versions":[{"version":">= 1.1.47, < 2.4.0","status":"affected"}]},{"vendor":"bsv-blockchain","product":"@bsv/wallet-toolbox-mobile","versions":[{"version":">= 1.3.21, < 2.4.0","status":"affected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":8.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-28T17:17:06.726403Z","id":"CVE-2026-56744","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-1288"}]}],"references":[{"url":"https://github.com/bsv-blockchain/ts-stack/commit/3a11f6111919245a3090e9f3895cfc4f21a80d28","source":"security-advisories@github.com"},{"url":"https://github.com/bsv-blockchain/ts-stack/commit/5492cabbef4ddc7f60cc49cdf5d8c74ed2e5d949","source":"security-advisories@github.com"},{"url":"https://github.com/bsv-blockchain/ts-stack/commit/5ee60395e78e8b822d9a78efeacc6039c249819b","source":"security-advisories@github.com"},{"url":"https://github.com/bsv-blockchain/ts-stack/security/advisories/GHSA-36f9-7rg5-cpf8","source":"security-advisories@github.com"},{"url":"https://github.com/bsv-blockchain/wallet-toolbox/commit/ca651b067c0238cd8b1ddd3af225daa503857a07","source":"security-advisories@github.com"},{"url":"https://github.com/bsv-blockchain/ts-stack/security/advisories/GHSA-36f9-7rg5-cpf8","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}