pincushion-mcp@1.12.4
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AI Security Review
scanned 3d ago · by lpm-firewall-aiThe package’s login telemetry sends the user’s email to PostHog, although the changelog says analytics never sends emails. Telemetry is opt-out, so this undisclosed collection of identifying data warrants a warning rather than a malicious verdict.
Static reason
High-risk behavior combination matched malicious policy.; previous stored version diff introduced dangerous source
Trigger
A successful pincushion login, including login initiated by setup or claim.
Impact
PostHog receives a directly identifying email linked to login telemetry and the install ID.
Mechanism
captureLoginCompleted sets the normalized email as distinctId; the PostHog client sends it with the mcp_login_completed event.
AI rationale
The package’s login telemetry sends the user’s email to PostHog, although the changelog says analytics never sends emails. Telemetry is opt-out, so this undisclosed collection of identifying data warrants a warning rather than a malicious verdict.
Evidence
lib/posthog.jslogin.mjsCHANGELOG.md
Network endpoints1
us.i.posthog.com
Decision evidence
public snapshotAI called this Suspicious at 98.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- The login-completed telemetry uses the normalized account email as its distinct ID.
- The PostHog client sends that distinct ID with the login event.
- After successful sign-in, login.mjs calls the telemetry function with the email and flushes the event.
Evidence against
- Telemetry can be disabled with PINCUSHION_NO_TELEMETRY=1 or DO_NOT_TRACK=1.
- The changelog says analytics never sends emails, which conflicts with the login event implementation.
- package.json has no install, preinstall, or postinstall lifecycle scripts.
Behavioral surface
ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetworkShell
HighEntropyStringsTelemetryUrlStrings
NoLicense
Source & flagged code
12 flaggedmobile-wall.mjsView file
17// injectable so both modes are testable without a simulator.
L18: import { execFileSync } from 'node:child_process';
L19: import {
High
mobile-wall.mjs#virtual:normalized:round1View file
121function publicUrlFrom(text) {
L122: const m = /(https?:\/\/[^\s"'<>]+)/.exec(String(text || ''));\n return m ? m[1].replace(/[),.;]+$/, '') : '';\n}\n\nasync function fetchCloudAnnotations(ctx, { baseUrl, key, proje...
L123: }
Critical
Same File Env Network Execution
A single source file combines environment access, network access, and code or shell execution with blocking evidence.
mobile-wall.mjs#virtual:normalized:round1View on unpkg · L12117// injectable so both modes are testable without a simulator.
L18: import { execFileSync } from "node:child_process";
L19: import {
...
L32: const DEFAULT_OUT = "crit-wall";
L33: const DEFAULT_FUNCTION_BASE = "https://dpsqzszdviltqvethxbr.supabase.co/functions/v1";
L34:
...
L78: function isSignedIn() {
L79: if (process.env.PINCUSHION_LICENSE_KEY) return true;
L80: try { return !!readFileSync(join(homedir(), ".pincushion", "license-key"), "utf8").trim(); } catch { return false; }
L81: }
...
L97: const firstLine = (e) => String(e.message || e).split("\n")[0];
L98: const execErrText = (e) => [e?.stderr, e?.stdout, e?.message].filter(Boolean).join("\n");
Findings
5 Critical8 High4 Medium6 Low
CriticalSame File Env Network Executionmobile-wall.mjs#virtual:normalized:round1
CriticalCredential Exfiltrationserver.js
CriticalDownload Executemobile-wall.mjs#virtual:normalized:round1
CriticalTrigger Reachable Dangerous Capabilityserver.js
CriticalPrevious Version Dangerous Deltalib/model-free-capture-report.js
HighChild Processmobile-wall.mjs
HighShell
HighCommand Output Exfiltrationmobile-wall.mjs#virtual:normalized:round1
HighSandbox Evasion Gated Capabilitylib/setup-runtime.js
HighCopied Package Dependency Bridgelib/posthog.js
HighTrigger Reachable Credential Exfiltrationserver.js
Affected versions and remediation
This report applies to pincushion-mcp@1.12.4.
See all versions of pincushion-mcp for other recorded verdicts.
- Review the evidence and your use of pincushion-mcp@1.12.4 before allowing it. Restrict the permissions described in this report.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
Evidence last updated: .
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