Skills/PyPI/notebook-editor-mcp

notebook-editor-mcp@0.1.2

CAUTION· install only

Publisher claims: "Local Jupyter notebook editor an MCP client drives, with a browser tab watching the same session" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry PyPI (MCP server)Publisher aglyx3 · publishing for 81 daysInstalls 51Last detonated 27 h 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 react.dev — 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 -- uvx notebook-editor-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 2026-11-13 and scored it 74/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Bidirectional text override characters detected; Hidden zero-width characters detected; 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

MEDIUM
File type combined with upload actionbackend/app/web/assets/index-C7CcAN73.js:1 · File type combined with upload action — agent may exfiltrate local data files…on");const r=await fetch(`${Wt}${e}`,{...n,headers:s});if(!r.ok){const l=await r.json().catch(()=>null);throw new _e(r.status,l?.error??{code:"request_failed",message:r.statusText||"Request failed",details:{}})}if(r.status!==204)return r.j…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
Process kill commandbackend/app/plot_tuning/apply.py:428 · Process kill command — agent can terminate processesrealises that halfway through needs a way out that is not "kill theFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
Python subprocess execution detectedbackend/app/agent_workspace/runner.py:33 · Python subprocess execution detectedprocess = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
HIGH
Bidirectional text override characters detectedbackend/app/web/assets/editor-BSG6ZZEK.js:11 · Bidirectional text override characters detected — may hide content direction…const uo=/x/.unicode!=null?"gu":"g",om=new RegExp(`[\0-\b --Ÿ­؜​‎‏\u2028\u2029‭‮⁦⁧⁩\uFEFF-]`,uo),lm={0:"null",7:"bell",8:"backspace",10:"newline",11:"vertica…Fix: Replace encoded or assembled strings with plain literals and remove undeclared network calls.
AST07
HIGH
Hidden zero-width characters detectedbackend/app/web/assets/editor-BSG6ZZEK.js:11 · Hidden zero-width characters detected — may conceal content…d:u})}}return t}}const uo=/x/.unicode!=null?"gu":"g",om=new RegExp(`[\0-\b --Ÿ­؜​‎‏\u2028\u2029‭‮⁦⁧⁩\uFEFF-]`,uo),lm={0:"null",7:"bell",8:"backspace",10:"new…Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST07
HIGH
Access to sensitive file pathsbackend/app/kernel_execution/risky_cell_classifier.py:17 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files(re.compile(r"(?i)(?:\.env\b|dotenv\b|\.pem\b|\.key\b|\.ssh\b|credentials?|\.aws/|\.config/gcloud)"), "credential_access", "Accesses secrets or credentials"),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
Process kill commandbackend/app/plot_tuning/discovery.py:346 · Process kill command — agent can terminate processesname of the same spelling. Rejecting on that would kill a perfectly goodFix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
File type combined with upload actionbackend/app/web/assets/react-oopq03Tk.js:8 · File type combined with upload action — agent may exfiltrate local data files…nstable_NormalPriority,M1=D.unstable_LowPriority,hi=D.unstable_IdlePriority,D1=D.log,U1=D.unstable_setDisableYieldValue,Ma=null,Fl=null;function Wt(l){if(typeof D1=="function"&&U1(l),Fl&&typeof Fl.setStrictMode=="function")try{Fl.setStrict…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
Python subprocess execution detectedbackend/app/mcp/server.py:680 · Python subprocess execution detectedprobe = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
File type combined with upload actionbackend/app/web/assets/editor-BSG6ZZEK.js:12 · File type combined with upload action — agent may exfiltrate local data files…fect(()=>{if(ce&&!ei){var Ze={doc:e,selection:t,extensions:Ci},Lt=Z?I.fromJSON(Z.json,Ze,Z.fields):I.create(Ze);if(_s(Lt),!_){var zt=new C({state:Lt,parent:ce,root:ye});Ne(zt),r&&r(zt,Lt)}}return()=>{_&&(_s(void 0),Ne(void 0))}},[ce,ei]),x…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
Python subprocess execution detectedbackend/app/agent_workspace/adapters.py:160 · Python subprocess execution detectedresult = subprocess.run(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05
MEDIUM
Python subprocess execution detectedbackend/app/mcp/supervisor.py:169 · Python subprocess execution detectedprocess = subprocess.Popen(Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST05

Cost to the agent

Instructions loaded
≈64 tok
1 file · 69 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 notebook-editor-mcp@0.1.2 as of 26 h ago. This is the package itself, not its dependencies.

What would make this Verified

6 points to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%
  1. Unclaimed publisher≈ +8 on the totalClaim aglyx3: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  2. Bidirectional text override characters detected≈ +4 on the totalReplace encoded or assembled strings with plain literals and remove undeclared network calls.
  3. Hidden zero-width characters detected≈ +4 on the totalKeep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
  4. 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.
  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. Process kill command≈ +2 on the totalBuild commands from fixed arguments; do not interpolate untrusted strings into a shell.
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