registry / Credential exfiltration / @cachly-dev/mcp-server / 0.10.203

@cachly-dev/mcp-server@0.10.203

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AI Security Review

scanned 6d ago · by lpm-firewall-ai

The runtime places an existing service JWT in telemetry bodies, with only an opt-out guard and a configurable destination. Because the default recipient is the package's intended service, this supports a warning for conditional credential exposure 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

A runtime telemetry event occurs while CACHLY_NO_TELEMETRY is not set to 1.

Impact

The telemetry recipient receives the JWT alongside event data; a configured alternate API URL also receives it.

Mechanism

The telemetry request includes the JWT in its JSON body and sends to the configured API URL, which defaults to api.cachly.dev.

AI rationale

Evidence

dist/src/index.jsdist/src/credentials.js

Network endpoints1

api.cachly.dev/api/v1/telemetry/mcp

Decision evidence

public snapshot

AI called this Suspicious at 86.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

The runtime obtains a Cachly JWT from environment variables, saved credentials, or the Cachly entry in .mcp.json.
The telemetry helper sends the JWT and user fingerprint in the request body; telemetry is disabled only when CACHLY_NO_TELEMETRY is set to 1.
Telemetry uses CACHLY_API_URL when configured and otherwise sends to api.cachly.dev.
The postinstall hook only prints setup instructions and performs no file or network operation.

Evidence against

The default telemetry recipient, api.cachly.dev, is also the package's intended API service.
The telemetry request is guarded by an explicit no-telemetry environment setting.

Behavioral surface

Source

ChildProcessDynamicRequireEnvironmentVarsEvalFilesystemNetwork

Supply chain

HighEntropyStringsMinifiedUrlStrings

ManifestNo manifest risk signals triggered.

Source & flagged code

17 flagged

package.jsonView file

Lines 18-58json

18 },

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

20 "scripts": {

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

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

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

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

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

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

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

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

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

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

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

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

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

34 "plugin-hooks:write": "tsx scripts/plugin-hooks-schreiben.mjs",

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

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

37 "build": "tsc && node scripts/paket-schliessen.mjs && node scripts/bauabdruck.mjs",

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

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L38

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L38

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

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

41 "test": "vitest run",

42 "test:watch": "vitest",

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

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

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

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

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

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

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

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

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

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

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

54 "lint": "eslint src",

55 "typecheck": "tsc --noEmit",

56 "bench:cost": "tsx src/bench/cost.ts",

57 "bench:zurueckhaltung": "tsx src/bench/zurueckhaltung-messen.ts",

58 "bench:ausgabe": "tsx src/bench/ausgabe-reihenfolge-messen.ts",

dist/src/autor.jsView file

Lines 1-2javascript

1import{execFileSync as c}from"node:child_process";const f=e=>n=>{try{return n.startsWith("-")?"":c(

dist/src/index.jsView file

Lines 1-21javascript

1#!/usr/bin/env node

2import{setzeClientKennung as Nt}from"./herkunft.js";import{jwtExpiryMs as Ht,checkJwt as Mt,handleApiError as Dt,diagnoseAuth as Se,planAuthHeal as Ue,readClientCredentialsFromEnv as Ut,buildClientCredentialsBody as Jt,clientCredentialsTokenUrl as zt}

dist/src/lernen.jsView file

Lines 1-7javascript

1import{appendFileSync as B,mkdirSync as U,readFileSync as S,readdirSync as K,rmSync as E,statSync as D,writeFileSync as y}from"node:fs";import{join as h}from"node:path";import{tmpdir

dist/src/cls-hook.jsView file

6`+n+` L7: `,"utf-8"),await s(t,493).catch(()=>{}),"appended"}const _="try{var p={instance_id:process.env.CACHLY_BRAIN_INSTANCE_ID,source:'git_commit',payload:{message:process.env.CLS_MSG||''... L8: `)}export{u as CLS_BLOCK_RE,p as CLS_HOOK_VERSION,L as buildClsPostCommitHook,x as installClsPostCommitHook};

High

Runtime Package Install

Package source invokes a package manager install command at runtime.

dist/src/cls-hook.jsView on unpkg · L6

dist/src/doctor.js#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 5

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

dist/src/doctor.js#virtual:normalized:round1View on unpkg

hooks/cachly-ambient-einblendung.mjsView file

•matchType = normalized_sha256 matchedPackage = @cachly-dev/mcp-server@0.10.197 matchedPath = hooks/cachly-ambient-einblendung.mjs matchedIdentity = npm:QGNhY2hseS1kZXYvbWNwLXNlcnZlcg:0.10.197 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.

hooks/cachly-ambient-einblendung.mjsView on unpkg

dist/src/handlers/cache.jsView file

•matchType = normalized_sha256 matchedPackage = @cachly-dev/mcp-server@0.10.197 matchedPath = dist/src/handlers/cache.js matchedIdentity = npm:QGNhY2hseS1kZXYvbWNwLXNlcnZlcg:0.10.197 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/src/handlers/cache.jsView on unpkg

dist/src/neue-fassung.jsView file

•matchType = normalized_sha256 matchedPackage = @cachly-dev/mcp-server@0.10.197 matchedPath = dist/src/neue-fassung.js matchedIdentity = npm:QGNhY2hseS1kZXYvbWNwLXNlcnZlcg:0.10.197 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/src/neue-fassung.jsView on unpkg

dist/src/startwissen.jsView file

•matchType = normalized_sha256 matchedPackage = @cachly-dev/mcp-server@0.10.197 matchedPath = dist/src/startwissen.js matchedIdentity = npm:QGNhY2hseS1kZXYvbWNwLXNlcnZlcg:0.10.197 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/src/startwissen.jsView on unpkg

dist/src/ambient-hooks.jsView file

•matchType = previous_version_dangerous_delta matchedPackage = @cachly-dev/mcp-server@0.10.202 matchedIdentity = npm:QGNhY2hseS1kZXYvbWNwLXNlcnZlcg:0.10.202 similarity = 0.950 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/ambient-hooks.jsView on unpkg

•matchType = token_shingles matchedPackage = @cachly-dev/mcp-server@0.10.197 matchedPath = dist/src/ambient-hooks.js matchedIdentity = npm:QGNhY2hseS1kZXYvbWNwLXNlcnZlcg:0.10.197 similarity = 1.000 shingleOverlap = 48 summary = source token shingles overlapped 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/src/ambient-hooks.jsView on unpkg

Source & flagged code

17 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/autor.jsView file

1import{execFileSync as c}from"node:child_process";const f=e=>n=>{try{return n.startsWith("-")?"":c("git",["config",n],{cwd:e,encoding:"utf-8",stdio:"pipe",timeout:1500,windowsHide:...

High

Child Process

Package source references child process execution.

dist/src/autor.jsView on unpkg · L1

Findings

2 Critical12 High5 Medium6 Low

CriticalHardcoded Runtime Data Exfiltrationdist/src/index.js

CriticalPrevious Version Dangerous Deltadist/src/ambient-hooks.js

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processdist/src/autor.js

HighSame File Env Network Executiondist/src/index.js

HighCredential Exfiltrationdist/src/index.js

HighTrigger Reachable Credential Exfiltrationdist/src/index.js

HighRuntime Package Installdist/src/cls-hook.js

HighSemantic Analysis Limiteddist/src/doctor.js#virtual:normalized:round1

HighKnown Malware Source Similarityhooks/cachly-ambient-einblendung.mjs

HighKnown Malware Source Similarity

Affected versions and remediation

This report applies to @cachly-dev/mcp-server@0.10.203.

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

Review the evidence and your use of @cachly-dev/mcp-server@0.10.203 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: 2026-10-16 14:14:06.226Z (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