registry / @cachly-dev/mcp-server / 0.10.128

@cachly-dev/mcp-server@0.10.128

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AI Security Review

scanned 2mo ago · by lpm-firewall-ai

Source confirms a user-invoked, first-party agent-extension lifecycle installer with persistent hooks and remote context processing. The postinstall script only displays instructions, so there is no basis for a malicious install-time block.

Static reason

One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source

Trigger

User runs init, setup, autosetup, autopilot, or join.

Impact

Future agent sessions and commits may automatically supply project context/metadata to the configured Cachly instance; generated npx latest invocations can change behavior on future runs.

Mechanism

User-invoked agent-extension and Git-hook installation with remote Cachly processing.

AI rationale

Evidence

package.jsonscripts/postinstall.jsdist/src/index.jsdist/src/ambient-hooks.jsdist/src/cls-hook.jsdist/src/credentials.js.mcp.json.cursor/mcp.json.windsurf/mcp.json.vscode/mcp.json~/.claude/mcp.json.claude/hooks/.claude/settings.json.git/hooks/post-commit~/.cachly/credentials.json

Network endpoints3

api.cachly.devauth.cachly.dev/realms/cachly/protocol/openid-connectregistry.npmjs.org/@cachly-dev/mcp-server/latest

Decision evidence

public snapshot

AI called this Suspicious at 93.0% confidence as Dangerous Capability with low false-positive risk.

Evidence for warning

Explicit init installs a Git post-commit hook and Claude ambient hooks.
setup/autopilot writes project MCP configs and global ~/.claude/mcp.json.
Generated Claude hooks forward hook stdin to a spawned CLI for prompt/session processing.
Git hook captures commit metadata and runs npx @cachly-dev/mcp-server@latest asynchronously.

Evidence against

postinstall only prints onboarding text; it does not write files or invoke network code.
Control-surface changes require explicit init/setup/autopilot CLI execution.
Observed network targets are Cachly-owned API/auth endpoints and npm registry; no unofficial credential gateway found.
No unconsented install-time mutation, foreign-package overwrite, or destructive behavior found.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsEvalFilesystemNetworkShell

Supply chain

Source & flagged code

14 flagged

package.jsonView file

Lines 16-56json

16 "cachly-mcp": "dist/src/index.js"

17 },

18 "main": "./dist/src/index.js",

19 "scripts": {

20 "count-tools": "node scripts/count-tools.mjs",

21 "tool-catalog": "node scripts/tool-catalog.mjs summary",

22 "tool-catalog:json": "node scripts/tool-catalog.mjs json",

23 "tool-catalog:markdown": "node scripts/tool-catalog.mjs markdown",

24 "capability-docs": "node scripts/capability-docs.mjs markdown",

25 "capability-docs:write": "node scripts/capability-docs.mjs write",

26 "verify-capability-docs": "node scripts/capability-docs.mjs check",

27 "docs-atlas": "node scripts/docs-atlas.mjs summary",

28 "docs-atlas:write": "node scripts/docs-atlas.mjs write",

29 "verify-docs-atlas": "node scripts/docs-atlas.mjs check",

30 "tool-spec-snapshots:write": "node scripts/tool-spec-snapshots.mjs write",

31 "version": "node scripts/nummer-nachziehen.mjs && npm run tool-spec-snapshots:write",

32 "verify-tool-spec-snapshots": "node scripts/tool-spec-snapshots.mjs check",

33 "verify-tool-counts": "node scripts/verify-tool-counts.mjs",

34 "verify-capabilities": "node scripts/verify-capabilities.mjs",

35 "build": "tsc && node scripts/bauabdruck.mjs",

36 "postinstall": "node scripts/postinstall.js",

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L36

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L36

37 "dev": "tsx src/index.ts",

38 "start": "node dist/src/index.js",

39 "test": "vitest run",

40 "test:watch": "vitest",

41 "bench": "tsx src/bench/echter-korpus.ts",

42 "bench:spielzeug": "tsx src/bench/cachly-bench.ts",

43 "bench:external": "tsx src/bench/external-corpus.ts",

44 "bench:onboarding": "tsx src/bench/onboarding-bench.ts",

45 "bench:gate": "tsx src/bench/gate.ts",

46 "test:e2e": "bash scripts/e2e-run.sh",

47 "test:e2e:api": "bash scripts/e2e-run.sh api",

48 "test:e2e:cli": "bash scripts/e2e-run.sh cli",

49 "test:e2e:tools": "bash scripts/e2e-run.sh tools",

50 "test:e2e:funnel": "bash scripts/e2e-run.sh funnel",

51 "test:e2e:provisioning": "bash scripts/e2e-run.sh provisioning",

52 "lint": "eslint src",

53 "typecheck": "tsc --noEmit",

54 "bench:cost": "tsx src/bench/cost.ts"

55 },

56 "dependencies": {

dist/src/bench/cachly-bench.jsView file

Lines 35-75javascript

35import { rerankByQuality } from '../rerank.js';

36import { BENCH_LESSONS, BENCH_QUERIES } from './fixtures.js';

37const LESSON_PREFIX = 'cachly:lesson:best:';

38// ── Minimal in-memory Redis (only what keywordSearch needs) ──────────────────

dist/src/ambient-hooks.jsView file

Lines 48-88javascript

48 const cli = opts.cliCommand ?? DEFAULT_CLI;

49 return [

50 `#!/usr/bin/env node`,

51 `// cachly Ambient Recall — ${event} ${AMBIENT_HOOK_VERSION}`

dist/src/tools.jsView file

Lines 2313-2353javascript

2313 'Example: brain_share(instance_id="...", title="My Auth Patterns", topic_filter=["auth"])',

2314 inputSchema: {

2315 type: 'object',

2316 properties: {

2317 instance_id: { type: 'string',

dist/src/confidence.jsView file

Lines 1-22javascript

1import { createHash } from 'node:crypto';

2// ── Confidence Decay Config ───────────────────────────────────────────────────

3export const CONFIDENCE_WARN_DAYS = Number(process.env.CACHLY_CONFIDENCE_WARN_DAYS ?? 5);

dist/src/handlers/cache.jsView file

Lines 12-52javascript

12 'cache_stats', 'semantic_search', 'detect_namespace', 'cache_warmup', 'index_project',

13 'cache_mset', 'cache_mget', 'cache_lock_acquire', 'cache_lock_release',

14 'cache_stream_set', 'cache_stream_get'

dist/src/index.jsView file

•matchType = previous_version_dangerous_delta matchedPackage = @cachly-dev/mcp-server@0.10.124 matchedIdentity = npm:QGNhY2hseS1kZXYvbWNwLXNlcnZlcg:0.10.124 similarity = 0.851 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/src/index.jsView on unpkg

•Manifest-reachable source captures an API credential, sends it to a fixed unofficial gateway, and persists that redirection in agent or shell configuration. dist/src/index.js: headers: { Authorization: `Bearer ${JWT}`, 'Content-Type': 'application/json' }, headers: { 'Content-Type': 'application/json', Authorization: `Bearer ${JWT}` }, headers: { Authorization: `Bearer ${JWT}`, Accept: 'application/json' }, // When the credential is near expiry we mint a fresh long-lived API key *while the /** Persist a (possibly refreshed) API key to ~/.claude/mcp.json so restarts keep it. const { writeFile, mkdir, readFile } = await import('node:fs/promises'); // Primary config: create or update ~/.claude/mcp.json const claudePath = resolve(home, '.claude', 'mcp.json');

High

Credential Redirect Persistence

Manifest-reachable source sends a prompted API credential to a fixed unofficial gateway and persists the redirection.

dist/src/index.jsView on unpkg

•Manifest-reachable source resolves another installed package, overwrites its runtime code, and injects package-defined remote behavior. dist/src/index.js: * CACHLY_API_URL – default https://api.cachly.dev let API_URL = process.env.CACHLY_API_URL ?? 'https://api.cachly.dev'; const { writeFile, mkdir, readFile } = await import('node:fs/promises'); await writeFile(claudePath, JSON.stringify(cfg, null, 2), 'utf-8'); await writeFile(p, JSON.stringify(sc, null, 2), 'utf-8'); const { writeFile, readFile } = await import('node:fs/promises'); await writeFile(p, JSON.stringify(cfg, null, 2), 'utf-8'); // window *title*, so `start "https://…"` opens an empty console window instead of the

dist/src/cls-hook.jsView file

69"files:(process.env.CLS_FILES||'').split(',').filter(Boolean)}};" + L70: "require('child_process').execFileSync('npx',['@cachly-dev/mcp-server@latest','cls-ingest',JSON.stringify(p)]," + L71: "{stdio:'ignore',timeout:8000});" +

High

Runtime Package Install

Package source invokes a package manager install command at runtime.

dist/src/cls-hook.jsView on unpkg · L69

Source & flagged code

14 flagged · loading source

package.jsonView file

•scripts.postinstall = node scripts/postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node scripts/postinstall.js

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

dist/src/bench/cachly-bench.jsView file

55get(key) { cmds.push(key); return this; }, L56: async exec() { L57: return cmds.map(k => [null, store.get(k) ?? null]);

High

Child Process

Package source references child process execution.

dist/src/bench/cachly-bench.jsView on unpkg · L55

Findings

1 Critical10 High5 Medium6 Low

CriticalPrevious Version Dangerous Deltadist/src/index.js

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processdist/src/bench/cachly-bench.js

HighShelldist/src/ambient-hooks.js

HighCredential Exfiltrationdist/src/handlers/cache.js

HighCredential Redirect Persistencedist/src/index.js

HighEntrypoint Foreign Package Code Overwritedist/src/index.js

HighExternal Ai Agent Control Surface Mutationdist/src/index.js

HighTrigger Reachable External Ai Agent Control Surface Mutationdist/src/index.js

HighTrigger Reachable Credential Exfiltrationdist/src/handlers/cache.js

HighRuntime Package Install

Affected versions and remediation

This report applies to @cachly-dev/mcp-server@0.10.128.

See all versions of @cachly-dev/mcp-server for other recorded verdicts.

Review the evidence and your use of @cachly-dev/mcp-server@0.10.128 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: 2026-08-21 11:45:26.487Z (UTC).

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

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Runtime surface

Behavioral surface

Source & flagged code