T08 · Insecure Dependencies
- Location
SKILL.md:11- Finding
Unpinned Wrangler Package Installation and Execution
- Content
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Vulnerability Details
File Location:
SKILL.md, line 11
Vulnerability Type: Unpinned third-party dependency execution
Risk Level: MediumVulnerable Code Snippet:
markdown - Install: `npm install -g wrangler` or use project-local `npx wrangler`Technical Analysis
The documented commands install or execute
wranglerwithout specifying a reviewed version.npm install -g wranglerresolves the package version from the configured npm registry and installs it globally. Depending on the local environment,npx wranglermay download and execute a package that is not already installed.Consequently, the code executed by these commands can change after this skill has been reviewed. If the upstream package, an npm account, the configured package registry, or the dependency chain is compromised, following the instructions could execute attacker-controlled package code under the invoking user's account. npm lifecycle scripts and the CLI itself may run during installation or invocation.
This is a supply-chain weakness rather than evidence that the current Wrangler package is malicious.
Attack Path
- An attacker compromises the Wrangler package distribution channel, one of its dependencies, an authorized publisher account, or a registry used by the victim.
- The attacker publishes or serves a malicious package release that satisfies the unpinned package request.
- A user follows the skill instructions and runs
npm install -g wrangleror invokesnpx wranglerwithout a verified local installation. - npm retrieves the attacker-controlled release or dependency.
- Malicious lifecycle or CLI code executes with the permissions of the user running the command.
- The payload can access resources available to that user, potentially including local project files, environment variables, npm configuration, cached credentials, and authenticated Cloudflare deployment capabilities.
Impact Assess
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- Remediation
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Remediation Suggestions
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Pin Wrangler to a reviewed, explicit version rather than resolving the latest available release:
bash npm install --save-dev --save-exact wrangler@<reviewed-version> -
Commit
package.jsonand the generated lockfile, review lockfile changes, and use deterministic installation in automated environments:bash npm ci -
Execute only the verified project-local installation. Avoid implicit
npxdownloads:bash npx --no-install wranglerAlternatively, invoke the local binary directly:
bash ./node_modules/.bin/wrangler -
Configure an approved npm registry and retain package-integrity metadata in the lockfile. Use registry access controls and dependency-scanning tools to detect compromised or unexpected releases.
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Review package provenance, publisher changes, lifecycle scripts, and dependency updates before upgrading the pinned version.
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Run Wrangler using a least-privileged operating-system account and narrowly scoped Cloudflare credentials. Avoid exposing unrelated secrets in the execution environment.
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Update
SKILL.mdso that its prerequisite instructions identify the approved version and explicitly warn users not to permitnpxto download an unreviewed package.
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