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devcodex@1.20.3: Malicious npm security report (Block) | LPM Firewall

registry / devcodex / 1.20.3

devcodex@1.20.3

DevCodex — cross-host AI coding engineering harness for Codex, Claude Code, GitHub Copilot, Gemini CLI, Grok, and Cursor

AI Security Review

scanned 23d ago · by lpm-firewall-ai

A global npm install automatically changes user-level configuration for six AI coding tools. It installs package-controlled hooks, MCP servers, instructions, and plugins that can affect future agent sessions.

Static reason

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

Trigger

Installing or updating the package globally causes npm to run postinstall.

Impact

Future Codex, Claude, Copilot, Gemini, Grok, and Cursor sessions can execute package-provided runtime code and use its injected control configuration.

Mechanism

Automatic global AI-agent configuration and hook injection.

Attack narrative

The npm postinstall hook detects a global install and automatically invokes global host configuration. That configuration resolves user home directories for six separate AI coding products and writes managed hooks, MCP settings, instructions, and plugins. These foreign, broad agent control surfaces are changed as an install side effect rather than through an explicit setup command, enabling package-controlled behavior in later agent sessions.

AI rationale

This is a concrete automatic postinstall mutation of broad, foreign AI-agent control surfaces. The guarded scope and lack of observed exfiltration do not remove the unconsented persistent control-plane modification.

Evidence

package.jsonscripts/lib/npm-lifecycle-adapter.jsscripts/lib/global-host-target.jsscripts/lib/global-host-config.js<home>/.copilot<home>/.claude<home>/.codex<home>/.gemini

Source & flagged code

19 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

index.jsView file

8L9: const fs = require('fs') L10: const os = require('os')

Medium

Dynamic Require

Package source references dynamic require/import behavior.

index.jsView on unpkg · L8

scripts/test-task-admission-authority.jsView file

66} L67: const KEEP_TEST_ARTIFACTS = process.env.DEVCODEX_KEEP_TEST_ARTIFACTS === '1' L68: const TEST_RUNTIME = { ... L95: fs.mkdirSync(path.join(activeRoot, 'profile'), { recursive: true }) L96: fs.writeFileSync(path.join(physicalRoot, 'package.json'), '{}\n') L97: return { physicalRoot, activeRoot, project: name } ... L644: assert.strictEqual(recovery.status, 'fresh') L645: const legacyState = JSON.parse(JSON.stringify(recovery.state)) L646: delete legacyState.taskRecoveryCommitFence ... L744: const templateSource = fs.readFileSync(resolveControlAsset( L745: path.resolve(__dirname, '..'), 'prompts/requirement-session.prompt.md' L746: ), 'utf8')

Low

Weak Crypto

Package source references weak cryptographic algorithms.

scripts/test-task-admission-authority.jsView on unpkg · L66

scripts/lib/devcodex-readiness.jsView file

1Install-time code directly mutates a foreign AI-agent control surface: L62: const env = options.env || process.env L63: const sessionId = String(env.CODEX_THREAD_ID || '').trim() L64: if (!sessionId) return null ... L179: } L180: fsImpl.mkdirSync(directory, { recursive: true }) L181: const unsafeAfter = unsafePathComponent(sharedRoot, file, fsImpl) ... L198: } L199: fsImpl.writeFileSync(temporary, `${JSON.stringify(payload, null, 2)}\n`, { encoding: 'utf8', flag: 'wx', mode: 0o600 }) L200: fsImpl.renameSync(temporary, file) ... L334: facts.globalLifecycleFilesPresent.status === 'BLOCK' || L335: facts.codexAdapterContractReady.status === 'BLOCK' || L336: facts.managedConfigDrift.status === 'BLOCK') { Write operation from scripts/lib/devcodex-readiness.js: L62: const env = options.env || pro

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/lib/devcodex-readiness.jsView on unpkg · L1

scripts/lib/cli-maintenance-commands.jsView file

•Manifest-trigger-reachable source links an external AI-agent control path to a behavior-bearing write operation. const current = fs.readfilesync(item.dest, 'utf8') fs.writefilesync(item.dest, updateprofiletierdeclaration(current, tier), 'utf8') continue } if (item.action === 'backup-and-generate') { const bak = `${item.dest}.bak.${backupid}` fs.copyfilesync(item.dest, bak) backedup++ } fs.writefilesync(item.dest, generators[item.file](), 'utf-8') } } log() const plannedtierupdates = actions.filter(item => item.action === 'update-tier').length log(` ${options.dryrun ? 'planned generate' : 'generated'}: ${generated} skipped: ${skipped} tier updates: ${plannedtierupdates} backed up: ${

High

Trigger Reachable External Ai Agent Control Surface Mutation

Manifest-trigger-reachable source writes behavior-bearing configuration into a user or project AI-agent control surface.

scripts/lib/cli-maintenance-commands.jsView on unpkg

hooks/_runtime/lifecycle-turn-liveness.cjs#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 10

High

Semantic Analysis Limited

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

hooks/_runtime/lifecycle-turn-liveness.cjs#virtual:normalized:round1View on unpkg

scripts/test-global-install-smoke.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.20.2 matchedPath = scripts/test-global-install-smoke.js matchedIdentity = npm:ZGV2Y29kZXg:1.20.2 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.

scripts/test-global-install-smoke.jsView on unpkg

scripts/test-host-adapters.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.20.2 matchedPath = scripts/test-host-adapters.js matchedIdentity = npm:ZGV2Y29kZXg:1.20.2 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.

scripts/test-host-adapters.jsView on unpkg

scripts/lib/node-runtime-readiness.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.20.2 matchedPath = scripts/lib/node-runtime-readiness.js matchedIdentity = npm:ZGV2Y29kZXg:1.20.2 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.

scripts/lib/node-runtime-readiness.jsView on unpkg

scripts/lib/real-codex-host-probe.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.20.2 matchedPath = scripts/lib/real-codex-host-probe.js matchedIdentity = npm:ZGV2Y29kZXg:1.20.2 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.

scripts/lib/real-codex-host-probe.jsView on unpkg

scripts/test-derived-state-lock-concurrency.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.20.2 matchedPath = scripts/test-derived-state-lock-concurrency.js matchedIdentity = npm:ZGV2Y29kZXg:1.20.2 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.

scripts/test-derived-state-lock-concurrency.jsView on unpkg

scripts/test-real-codex-host-probe.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.20.2 matchedPath = scripts/test-real-codex-host-probe.js matchedIdentity = npm:ZGV2Y29kZXg:1.20.2 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.

scripts/test-real-codex-host-probe.jsView on unpkg

scripts/test-security-audit.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.20.2 matchedPath = scripts/test-security-audit.js matchedIdentity = npm:ZGV2Y29kZXg:1.20.2 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.

scripts/test-security-audit.jsView on unpkg

scripts/test-session-route-consumers.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.20.2 matchedPath = scripts/test-session-route-consumers.js matchedIdentity = npm:ZGV2Y29kZXg:1.20.2 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.

scripts/test-session-route-consumers.jsView on unpkg

scripts/test-validation-wave-executor.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.20.2 matchedPath = scripts/test-validation-wave-executor.js matchedIdentity = npm:ZGV2Y29kZXg:1.20.2 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.

scripts/test-validation-wave-executor.jsView on unpkg

scripts/instruction-fallback-check.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.20.2 matchedPath = scripts/instruction-fallback-check.js matchedIdentity = npm:ZGV2Y29kZXg:1.20.2 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.

scripts/instruction-fallback-check.jsView on unpkg

scripts/plan-ci-validation.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.20.2 matchedPath = scripts/plan-ci-validation.js matchedIdentity = npm:ZGV2Y29kZXg:1.20.2 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.

scripts/plan-ci-validation.jsView on unpkg

scripts/test-host-capability-routing.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.20.2 matchedPath = scripts/test-host-capability-routing.js matchedIdentity = npm:ZGV2Y29kZXg:1.20.2 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.

scripts/test-host-capability-routing.jsView on unpkg