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@codexed/codex@0.149.0-codexed.4: AI-agent control-surface risk | LPM Firewall

registry / @codexed/codex / 0.149.0-codexed.4

@codexed/codex@0.149.0-codexed.4

<p align="center"><strong>Codex CLI</strong> is a coding agent from OpenAI that runs locally on your computer. <p align="center"> <img src="https://github.com/openai/codex/blob/main/.github/codex-cli-splash.png" alt="Codex CLI splash" width="80%" /> </p

AI Security Review

scanned 3h ago · by lpm-firewall-ai

LPM flags this version as an AI-agent control-surface risk. On unconsented global npm installation, the postinstall hook replaces the existing global `codex` launcher with this package's launcher. This hijacks the command used to invoke an AI coding agent.

Static reason

High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review; source fingerprint signature matched known malicious package; routed for review

Trigger

npm global installation

Impact

Subsequent `codex` invocations execute this package's wrapper and its selected platform binary.

Mechanism

postinstall deletion and replacement of the global codex launcher

Policy narrative

The automatic postinstall hook activates only for global installs, derives the npm prefix, recursively removes its existing `codex` launcher, and replaces it with a symlink or Windows launcher pointing at this package. The package uses the `@codexed` namespace but its README identifies it as OpenAI Codex and directs installation of `@openai/codex`, making the replacement of the shared AI-agent command unconsented and deceptive.

Rationale

Source confirms an install-time overwrite of the global `codex` command, a broad AI-agent control surface. No separate exfiltration is required for this concrete command-hijacking chain.

Evidence

package.jsonscripts/postinstall.mjsbin/codex.jsREADME.md<npm prefix>/bin/codex<npm prefix>/bin/codex.codexed-tmp<npm prefix>/codex.cmd<npm prefix>/codex.ps1

Source & flagged code

8 flagged · loading source

package.jsonView file

•dependencies registry_only=@codexed/codex-linux-arm64,@codexed/codex-linux-x64,@codexed/codex-win32-x64

Critical

Manifest Confusion

Tarball package.json differs from the npm registry version manifest for scripts or dependency sets.

package.jsonView on unpkg

•scripts.postinstall = node scripts/postinstall.mjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

23"scripts": { "postinstall": "node scripts/postinstall.mjs" }

High

Suspicious Lifecycle Evidence

postinstall runs automatically on installation.

package.jsonView on unpkg · L23

•scripts.postinstall = node scripts/postinstall.mjs

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

scripts/postinstall.mjsView file

2L3: import { chmodSync, mkdirSync, renameSync, rmSync, symlinkSync, writeFileSync } from "node:fs"; L4: import os from "node:os"; ... L26: const launcherPath = path.join(binDir, "codex"); L27: const tmpPath = `${launcherPath}.codexed-tmp`; L28: L29: mkdirSync(binDir, { recursive: true }); L30: chmodSync(codexJs, 0o755); ... L42: L43: mkdirSync(launcherDir, { recursive: true }); L44: L45: writeFileSync(

Critical

Ai Agent Control Hijack

Source creates an unconsented AI-agent control surface through install-time mutation or a default unauthenticated remote skill channel.

scripts/postinstall.mjsView on unpkg · L2

57if (!isGlobalInstall()) { process.exit(0); } const prefix = resolvePrefix(); if (os.platform() === "win32") { replaceWindowsLauncher(prefix); } else { replacePosixLauncher(prefix); }

High

Ai Review Evidence

On global installs it deletes prefix/bin/codex and replaces it with a symlink to this package.

scripts/postinstall.mjsView on unpkg · L57

bin/codex.jsView file

•matchType = normalized_sha256 matchedPackage = @codexed/codex@0.149.0-codexed.3 matchedPath = bin/codex.js matchedIdentity = npm:QGNvZGV4ZWQvY29kZXg:0.149.0-codexed.3 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.

bin/codex.jsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = 8b9951f2d34b50c6 signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = @codexed/codex@0.149.0-codexed.3 matchedPath = bin/codex.js matchedIdentity = npm:QGNvZGV4ZWQvY29kZXg:0.149.0-codexed.3 similarity = 1.000 shingleOverlap = 2 summary = package final verdict is malicious

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

bin/codex.jsView on unpkg

Source & flagged code

8 flagged

package.jsonView file

Lines 3-32json

3 "version": "0.149.0-codexed.4",

4 "license": "Apache-2.0",

5 "bin": {

6 "codex": "bin/codex.js"

7 },

8 "type": "module",

9 "engines": {

10 "node": ">=16"

11 },

12 "files": [

13 "bin",

14 "scripts",

15 "README.md"

16 ],

17 "repository": {

18 "type": "git",

19 "url": "git+https://github.com/openai/codex.git",

20 "directory": "codex-cli"

21 },

22 "packageManager": "pnpm@10.33.0+sha512.10568bb4a6afb58c9eb3630da90cc9516417abebd3fabbe6739f0ae795728da1491e9db5a544c76ad8eb7570f5c4bb3d6c637b2cb41bfdcdb47fa823c8649319",

23 "scripts": {

Critical

Manifest Confusion

Tarball package.json differs from the npm registry version manifest for scripts or dependency sets.

package.jsonView on unpkg · L23

24 "postinstall": "node scripts/postinstall.mjs"

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L24

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L24

25 },

High

Suspicious Lifecycle Evidence

postinstall runs automatically on installation.

package.jsonView on unpkg · L23

26 "optionalDependencies": {

27 "@codexed/codex-linux-x64": "0.149.0-codexed.4",

28 "@codexed/codex-linux-arm64": "0.149.0-codexed.4",

29 "@codexed/codex-win32-x64": "0.149.0-codexed.4"

30 }

31}

32

scripts/postinstall.mjsView file

Lines 1-22javascript

1#!/usr/bin/env node

2

3import { chmodSync, mkdirSync, renameSync, rmSync, symlinkSync, writeFileSync } from "node:fs";

4import os from "node:os";

Critical

Ai Agent Control Hijack

Source creates an unconsented AI-agent control surface through install-time mutation or a default unauthenticated remote skill channel.

scripts/postinstall.mjsView on unpkg · L2

5import path

bin/codex.jsView file

•matchType = normalized_sha256 matchedPackage = @codexed/codex@0.149.0-codexed.3 matchedPath = bin/codex.js matchedIdentity = npm:QGNvZGV4ZWQvY29kZXg:0.149.0-codexed.3 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.

bin/codex.jsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = 8b9951f2d34b50c6 signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = @codexed/codex@0.149.0-codexed.3 matchedPath = bin/codex.js matchedIdentity = npm:QGNvZGV4ZWQvY29kZXg:0.149.0-codexed.3 similarity = 1.000 shingleOverlap = 2 summary = package final verdict is malicious

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

bin/codex.jsView on unpkg