Skills/npm/chrome-devtools-mcp

chrome-devtools-mcp@1.13.0

CAUTION· install only

Publisher claims: "MCP server for Chrome DevTools" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry npm (MCP server)Publisher chromedevtools · publishing for 550 daysInstalls 9.6MLast detonated 3d ago
What would fix thisWatchDispute verdict

Coverage

Nothing executable in the bundle ran; the trace covers the install step only.
Tested
every file read, file written and host contacted by what ran
Not tested
use of the skill by an agent

What this means for the label: Caution here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.

Before you give it your token

It will ask for
no credential variables read in the code
Where it talks to
no vendor host named in the codeAlso ffmpeg.org, crbug.com, pptr.dev, google.com, js.org — not the publisher's domain; check what for before connecting.
What the honeypot saw
no credential files read · no network
What we could not test
use of the skill by an agent

Connect it under the guard. Nothing executable in the bundle ran; the trace covers the install step only. The code names no credential variable; the guard pins the network to what the honeypot saw and logs every call.

$vet-skills run --net declared -- npx -y chrome-devtools-mcp

Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.

Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (1 scenario; nothing executable in the bundle ran; the trace covers the install step only) on 2026-11-11 and scored it 73/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Access to sensitive file paths; Access to sensitive file paths; Access to sensitive file paths. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 0 s · 1 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
0.0sprocessscript backend runs setup only
0.0sprocessscript backend runs setup only
0.0sprocessno install scripts to re-run

Static findings

HIGH
Access to sensitive file pathsout/Default/gen/src/ToolHandler.js:133 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files// `http://x/../../etc/passwd`, and the downstream filesystem API (e.g.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsout/Default/gen/src/utils/url.js:198 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files* `view-source:file:///etc/passwd` reads the file just asFix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsout/Default/gen/src/config/ServerConfig.js:111 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesconst env = options?.env ?? process.env;Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsout/Default/gen/src/config/ServerConfig.js:220 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesenv: options?.env ?? this.#env,Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsout/Default/gen/src/utils/url.js:203 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files* (`view-source:FILE:///etc/passwd`) is normalised.Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
document.cookie accessskills/cookie-debugging/SKILL.md:12 · document.cookie access — can steal session cookies…ly` cannot be accessed or modified by client-side JavaScript (`cookieStore` or `document.cookie`). However, the browser **automatically attaches active HttpOnly cookies to out…Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.
AST07
HIGH
Access to sensitive file pathsout/Default/gen/src/utils/url.js:199 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files* `file:///etc/passwd` does, and `view-source:devtools://devtools/...`Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
npx invocation of non-well-known packageout/Default/gen/src/McpResponse.js:560 · npx invocation of non-well-known package — may execute untrusted code'- For npx: npx --package chrome-devtools-mcp@latest --package @toon-format/toon@latest chrome-devtools-mcp --experimentalDataFormat=toon\n' +Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
document.cookie accessskills/cookie-debugging/SKILL.md:29 · document.cookie access — can steal session cookies| Action | Client JavaScript (`cookieStore` / `document.cookie`) | DevTools Network & Context Tools |Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.
AST07
MEDIUM
File type combined with upload actionskills/chrome-devtools-cli/SKILL.md:57 · File type combined with upload action — agent may exfiltrate local data fileschrome-devtools upload_file 1 "id" "file.txt" # Upload a file through a provided elementFix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
HIGH
document.cookie accessskills/cookie-debugging/SKILL.md:38 · document.cookie access — can steal session cookies…tempting to clear an `HttpOnly` cookie via JavaScript (`cookieStore.delete` or `document.cookie = "...; max-age=0"`) will silently fail. To test in an unauthenticated or fresh…Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.
AST07
MEDIUM
npx invocation of non-well-known packageout/Default/gen/src/McpResponse.js:571 · npx invocation of non-well-known package — may execute untrusted code'- For npx: npx --package chrome-devtools-mcp@latest --package @blackwell-systems/gcf@latest chrome-devtools-mcp --experimentalDataFormat=gcf\n' +Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
Unicode escape sequence detectedout/Default/gen/src/third_party/cli.js:37 · Unicode escape sequence detected — may contain obfuscated payloads…=> { return /[#*0-9]\uFE0F?\u20E3|[\xA9\xAE\u203C\u2049\u2122\u2139\u2194-\u2199\u21A9\u21AA\u231A\u231B\u2328\u23CF\u23ED-\u23EF\u23F1\u23F2\u23F8-\u23FA\u24C2\u25AA\u25AB\u25B6\u25C0\u25FB\u25FC\u25FE…Fix: Put hosts, commands and strings in plain source. Decoding at runtime looks identical to malware and costs points on its own.
AST07
MEDIUM
File type combined with upload actionskills/chrome-devtools-cli/SKILL.md:58 · File type combined with upload action — agent may exfiltrate local data fileschrome-devtools upload_file 1 "id" "file.txt" --includeSnapshot true # Upload a file and return a snapshotFix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
File type combined with upload actionskills/a11y-debugging/SKILL.md:22 · File type combined with upload action — agent may exfiltrate local data files- Omit `outputDirPath` to save reports to the default temporary directory (the exact path to `report.json` is returned under `Reports`), or set `outputDirPath` to a directory within the workspace.Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
File type combined with upload actionout/Default/gen/src/bin/chrome-devtools.js:192 · File type combined with upload action — agent may exfiltrate local data filesconsole.log(await handleResponse(JSON.parse(response.result), argv['output-format']));Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
LOW
Unpinned dependencyout/Default/gen/src/bin/chrome-devtools.js:19 · Unpinned dependencyawait checkForUpdates('Run `npm install -g chrome-devtools-mcp@latest` and `chrome-devtools start` to update and restart the daemon.');Fix: Pin the exact version (`[email protected]`, `==1.2.3`) so every install gets the bytes that were reviewed.
AST06
MEDIUM
npx invocation of non-well-known packageskills/troubleshooting/SKILL.md:91 · npx invocation of non-well-known package — may execute untrusted code- If you need more information, run `NODE_DEBUG=* npx chrome-devtools-mcp@latest --logFile=/tmp/cdm-test.log` to capture verbose logs. Analyze the output for errors.Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packageskills/troubleshooting/SKILL.md:90 · npx invocation of non-well-known package — may execute untrusted code- Run `npx chrome-devtools-mcp@latest --help` to verify the installation and Node.js environment.Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packageout/Default/gen/src/config/ConfigParser.js:40 · npx invocation of non-well-known package — may execute untrusted code.scriptName('npx chrome-devtools-mcp@latest')Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
document.cookie accessskills/cookie-debugging/SKILL.md:144 · document.cookie access — can steal session cookies- **`cookieStore` is undefined**: `cookieStore` requires a Secure Context (`https://`, `localhost`, or `127.0.0.1`). On non-secure HTTP origins, use `() => document.cookie` or test over HTTPS.Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.
AST07
HIGH
document.cookie accessskills/cookie-debugging/SKILL.md:122 · document.cookie access — can steal session cookies- _Fallback for insecure HTTP origins_: `() => document.cookie`.Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.
AST07
MEDIUM
npx invocation of non-well-known packageskills/chrome-devtools/SKILL.md:8 · npx invocation of non-well-known package — may execute untrusted code…istent Chrome profile. Configure via CLI args in the MCP server configuration: `npx chrome-devtools-mcp@latest --help`. Addional tooling can be enabled by providing the following flags: - F…Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
File type combined with upload actionskills/troubleshooting/SKILL.md:91 · File type combined with upload action — agent may exfiltrate local data files- If you need more information, run `NODE_DEBUG=* npx chrome-devtools-mcp@latest --logFile=/tmp/cdm-test.log` to capture verbose logs. Analyze the output for errors.Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07

Cost to the agent

Instructions loaded
≈12,904 tok
7 files · 80 in bundle

Tokens estimated at four characters each. Skills load their instruction text when triggered; the figure is what that costs.

Known vulnerabilities

No advisories in OSV for chrome-devtools-mcp@1.13.0 as of 3d ago. This is the package itself, not its dependencies.

What would make this Verified

7 points to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%
  1. Unclaimed publisher≈ +8 on the totalClaim chromedevtools: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  2. Access to sensitive file paths≈ +4 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
  3. document.cookie access≈ +4 on the totalReplace encoded or assembled strings with plain literals and remove undeclared network calls.
  4. npx invocation of non-well-known package≈ +2 on the totalPin versions and sources; vendor anything fetched at install time.
  5. File type combined with upload action≈ +2 on the totalRemove the call, or declare the host in frontmatter and explain in the README what is sent and why.
  6. Unicode escape sequence detected≈ +2 on the totalPut hosts, commands and strings in plain source. Decoding at runtime looks identical to malware and costs points on its own.
Publish a new version to npm, then queue it here. Not your skill? Claim the handle to get verdict changes by email.Claim chromedevtoolsPropose a patch to the maintainer