T08 · Insecure Dependencies
Warning
- Location
- SKILL.md:55
- Finding
- Unpinned Third-Party Package Execution Through npx<![CDATA[ ## Vulnerability Details **File Location**: `SKILL.md`, lines 55-61 **Vulnerability Type**: Unpinned executable dependency **Risk Level**: Medium ### Vulnerable Code ```markdown ## Using with x402-payment ```bash npx @springmint/x402-payment \ --url "https://www.cpbox.io/api/x402/suggest?q=albert&rich=true&count=10" \ --method GET ``` ``` ### Technical Analysis The documented workflow instructs users to execute `@springmint/x402-payment` through `npx` without specifying an exact package version. If the package is not already available locally, `npx` can retrieve the current package release from the configured npm registry and immediately execute its code. The project does not include a lockfile, integrity hash, vendored source, or other mechanism that binds this command to a version reviewed with the Skill. Consequently, the code executed by users may change after the Skill itself has been audited. This creates a supply-chain risk if the package, its dependencies, its publisher account, or the configured package registry is compromised. The risk is elevated because the package participates in wallet-backed payment signing. Depending on the user's environment and wallet configuration, downloaded package code may be able to inspect process data, local files, environment variables, wallet interfaces, or other credentials available to the invoking account. ### Attack Path 1. An attacker compromises the npm package publisher, a transitive dependency, or the registry path used to resolve `@springmint/x402-payment`. 2. The attacker publishes a malicious or compromised version under the same package name. 3. A user follows the documented command without specifying a reviewed version. 4. `npx` resolves and downloads the mutable package version. 5. The downloaded package executes with the permissions of the invoking user. 6. Malicious code accesses resources available to that process, potentially including wallet interfaces, signing capabilities, ...[truncated 1134 chars]
- Remediation
- <![CDATA[ ## Remediation Suggestions 1. Pin the package to an exact, reviewed version rather than allowing `npx` to resolve the latest release: ```bash npx --yes @springmint/x402-payment@<reviewed-exact-version> \ --url "https://www.cpbox.io/api/x402/suggest?q=albert&rich=true&count=10" \ --method GET ``` 2. Install the dependency through a package manifest and commit a lockfile so that both the direct dependency and its transitive dependencies are reproducible. 3. Verify package integrity using registry-provided integrity metadata or a separately published checksum. Revalidate the package before updating the pinned version. 4. Document the expected official registry and source repository to reduce dependency-confusion and registry-substitution risks. 5. Review the package and relevant transitive dependencies before approving upgrades, particularly code that interacts with wallets, signing APIs, environment variables, or local credential stores. 6. Run the payment client in a restricted environment with minimal filesystem and network access. 7. Use a dedicated wallet with limited funds, narrowly scoped signing authority, explicit transaction confirmation, and spending limits. Do not expose unrelated wallet seed phrases or private keys to the process. 8. Consider installing the verified package ahead of time and invoking the locked local binary instead of permitting runtime download and execution. ]]>