registry / suppa-mcp-2 / 1.40.3

suppa-mcp-2@1.40.3

MCP server for the Suppa platform (modern.suppa.me) — Tasks, Docs/Pages, Entities & Schema, Forms, Automations, and file attachments, with multi-tenant Google auth. Node port of PyPI suppa-mcp.

AI Security Review

scanned 14d ago · by lpm-firewall-ai

The postinstall automatically configures agent hooks and guidance, creating a real lifecycle-driven agent integration risk. Its project-specific gates and package-owned schema purpose support a warning rather than a block.

Static reason

High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review; previous stored version diff introduced dangerous source

Trigger

Installing the package with npm in a non-CI, non-global project that contains Suppa schema code or an @suppa dependency.

Impact

Agent actions in the project can be subject to the package's schema rules and checks without a separate installer command.

Mechanism

The postinstall launches the package's guard installer, which adds Claude Code hooks and managed guidance to AGENTS.md and CLAUDE.md.

AI rationale

Evidence

package.jsonskills/suppa-entity-code/scripts/postinstall.mjsskills/suppa-entity-code/scripts/install-entity-code-guards.mjs.claude/settings.jsonAGENTS.mdCLAUDE.md

Decision evidence

public snapshot

AI called this Suspicious at 91.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

package.json runs the guard installer from an automatic postinstall hook.
The postinstall invokes the installer only for a non-global, non-CI install in a project with Suppa schema code or an @suppa dependency.
The installer adds Claude Code hooks for file writes and edits, and a stop hook.
The installer also writes a managed section into AGENTS.md and CLAUDE.md.

Evidence against

The postinstall supports an opt-out and skips CI, global installs, the package's own install, and projects without Suppa indicators.
The inspected auth code sends refresh credentials to the tenant host's refresh route; no unrelated recipient was identified.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

Source & flagged code

13 flagged

package.jsonView file

•scripts.postinstall = node skills/suppa-entity-code/scripts/postinstall.mjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node skills/suppa-entity-code/scripts/postinstall.mjs

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

dist/auth.jsView file

•matchType = previous_version_dangerous_delta matchedPackage = suppa-mcp-2@1.33.0 matchedIdentity = npm:c3VwcGEtbWNwLTI:1.33.0 similarity = 0.667 summary = stored previous version shares package body but lacks this dangerous source file

Critical

Previous Version Dangerous Delta

This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.

dist/auth.jsView on unpkg

24import { randomBytes } from "node:crypto"; L25: import { spawn } from "node:child_process"; L26: import { createServer } from "node:http";

High

Child Process

Package source references child process execution.

dist/auth.jsView on unpkg · L24

•matchType = normalized_sha256 matchedPackage = suppa-mcp-2@1.26.0 matchedPath = dist/auth.js matchedIdentity = npm:c3VwcGEtbWNwLTI:1.26.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/auth.jsView on unpkg

dist/tools/entityCode.jsView file

81try { L82: const mod = await import(pathToFileURL(p).href); L83: return String(mod.BLOCKING_SUMMARY ?? "").trim() || "the house rules in SKILL.md";

Medium

Dynamic Require

Package source references dynamic require/import behavior.

dist/tools/entityCode.jsView on unpkg · L81

dist/auth.js#virtual:normalized:round1View file

21import { randomBytes } from "node:crypto"; L22: import { spawn } from "node:child_process"; L23: import { createServer } from "node:http"; L24: import { readFileSync, statSync, writeFileSync } from "node:fs"; ... L43: function b64urlJson(segment) { L44: const buf = Buffer.from(segment, "base64url"); L45: return JSON.parse(buf.toString("utf-8")); ... L216: headers, L217: body: data, L218: signal: controller.signal, ... L345: const VERB_MISMATCH = new Set([404, 405]); L346: /** The verb that last worked for a host"s refresh route. */\nconst refreshVerb = new Map();\n/** A date a person can read, from epoch seconds. */\nfunction readableDate(epochSecon...

Critical

Credential Exfiltration

Source appears to send environment or credential material to an external endpoint.

dist/auth.js#virtual:normalized:round1View on unpkg · L21

21Trigger-reachable chain: scripts.start -> dist/bin.js -> dist/server.js -> dist/auth.js L21: import { randomBytes } from "node:crypto"; L22: import { spawn } from "node:child_process"; L23: import { createServer } from "node:http"; L24: import { readFileSync, statSync, writeFileSync } from "node:fs"; ... L43: function b64urlJson(segment) { L44: const buf = Buffer.from(segment, "base64url"); L45: return JSON.parse(buf.toString("utf-8")); ... L216: headers, L217: body: data, L218: signal: controller.signal, ... L345: const VERB_MISMATCH = new Set([404, 405]); L346: /** The verb that last worked for a host"s refresh route. */\nconst refreshVerb = new Map();\n/** A date a person can read, from epoch seconds. */\nfunction readableDate(epochSecon...

Critical

Trigger Reachable Dangerous Capability

A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.

dist/auth.js#virtual:normalized:round1View on unpkg · L21

dist/version.jsView file

•Manifest-reachable source resolves another installed package, overwrites its runtime code, and injects package-defined remote behavior. dist/version.js: * node_modules holds; publishing a fix changes nothing until that client is import { mkdirSync, readFileSync, renameSync, writeFileSync } from "node:fs"; const REGISTRY_URL = `https://registry.npmjs.org/${PACKAGE_NAME}/latest`; writeFileSync(tmp, `${JSON.stringify(cache, null, 2)}\n`, "utf-8");

High

Entrypoint Foreign Package Code Overwrite

Manifest-reachable source overwrites another installed package with package-defined remote behavior.

dist/version.jsView on unpkg

dist/selfcheck.jsView file

•matchType = normalized_sha256 matchedPackage = suppa-mcp-2@1.30.0 matchedPath = dist/selfcheck.js matchedIdentity = npm:c3VwcGEtbWNwLTI:1.30.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/selfcheck.jsView on unpkg

Source & flagged code

13 flagged · loading source

package.jsonView file

•scripts.postinstall = node skills/suppa-entity-code/scripts/postinstall.mjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node skills/suppa-entity-code/scripts/postinstall.mjs

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

dist/auth.jsView file

Critical

Previous Version Dangerous Delta

This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.

dist/auth.js

Findings

3 Critical8 High5 Medium5 Low

CriticalCredential Exfiltrationdist/auth.js#virtual:normalized:round1

CriticalTrigger Reachable Dangerous Capabilitydist/auth.js#virtual:normalized:round1

CriticalPrevious Version Dangerous Deltadist/auth.js

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processdist/auth.js

HighEntrypoint Foreign Package Code Overwritedist/version.js

HighCommand Output Exfiltrationdist/auth.js#virtual:normalized:round1

HighTrigger Reachable Credential Exfiltrationdist/auth.js#virtual:normalized:round1

HighSemantic Analysis Limiteddist/auth.js#virtual:normalized:round1

HighKnown Malware Source Similaritydist/auth.js

Affected versions and remediation

This report applies to suppa-mcp-2@1.40.3.

See all versions of suppa-mcp-2 for other recorded verdicts.

Review the evidence and your use of suppa-mcp-2@1.40.3 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: 2026-10-09 11:18:33.988Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.