Skip to content
← archivevulnerability · 24 Sep 2026 · 19:32 UTC

GHSA-36f9-7rg5-cpf8: `@bsv/wallet-toolbox` / `-client` / `-mobile` don't verify storage-supplied recipient output scripts against c

VULNCVE-2026-56744source · GTH
HIGHHigh-risk vulnerability

last 60 dispatches · spectrum

Reported by @echennells (Eric Chennells). Migrated from public issue #191 to a private advisory. **Affected:** `@bsv/wallet-toolbox` / `-client` / `-mobile`. Verified in `2.1.21` and `2.1.21-parity-fix.2`; the relevant code is the same at current HEAD **Summary:** When `createAction` runs against a remote `StorageClient`, the storage server returns the outputs to build. `buildSignableTransaction` takes each non-change output's `lockingScript` from the storage response and signs it, without comparing it to the `lockingScript` the caller supplied in `args.outputs`. …

grounded ✓primary source ↗
Early access

Get the next one first.

Early access opens the actor API and MCP server first, plus alerts when an adversary you follow lands on the wire. One email when it's ready. Nothing else, ever.

bot-protected