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devcodex@1.19.4: AI-agent control-surface risk | LPM Firewall

registry / devcodex / 1.19.4

devcodex@1.19.4

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

AI Security Review

scanned 3h ago · by lpm-firewall-ai

LPM flags this version as an AI-agent control-surface risk. A global npm install automatically changes user-level configurations for Copilot, Claude, Codex, Gemini, Grok, and Cursor. It adds hooks and MCP configuration that cause package-controlled local code to run in those AI-agent environments.

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 through npm.

Impact

The package gains automatic execution and tool integration across multiple unrelated AI-agent control surfaces.

Mechanism

Postinstall writes global AI-agent hooks, plugins, instructions, and MCP configuration.

Policy narrative

The manifest invokes postinstall. For a global install, the lifecycle adapter executes configuration for six AI-agent products under the user home directory. The configuration builder writes managed instruction files, command hooks, plugins, and MCP server entries, including hook events such as pre-tool use and prompt submission. This broad, automatic mutation of foreign agent control surfaces is not limited to a package-owned extension or an explicit follow-up command.

Rationale

The package performs automatic postinstall mutation of several unrelated user-level AI-agent configurations and installs hooks that execute its runtime. This is a concrete unconsented control-surface expansion, despite no observed network exfiltration.

Evidence

package.jsonscripts/postinstall.jsscripts/lib/npm-lifecycle-adapter.jsscripts/lib/global-host-target.jsscripts/lib/global-host-config.js~/.copilot

Source & flagged code

12 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

47} L48: const KEEP_TEST_ARTIFACTS = process.env.DEVCODEX_KEEP_TEST_ARTIFACTS === '1' L49: ... L53: fs.mkdirSync(path.join(activeRoot, 'profile'), { recursive: true }) L54: fs.writeFileSync(path.join(physicalRoot, 'package.json'), '{}\n') L55: return { physicalRoot, activeRoot, project: name } ... L326: const identityPath = path.join(baseTaskRoot, '.memory', 'task.json') L327: const identity = JSON.parse(fs.readFileSync(identityPath, 'utf8')) L328: assert.strictEqual(identity.schemaVersion, 'TaskIdentityV2') ... L1283: fs.mkdirSync(path.join(reparseRoot.activeRoot, 'bugs'), { recursive: true }) L1284: fs.symlinkSync(outside, path.join(reparseRoot.activeRoot, 'bugs', '任务-reparse'), process.platform === 'win32' ? 'junction' : 'dir') L1285: const reparseInput = admissionInput(reparseRoot,

Low

Weak Crypto

Package source references weak cryptographic algorithms.

scripts/test-task-admission-authority.jsView on unpkg · L47

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/host-adapter-scope.jsView file

•Manifest-trigger-reachable source links an external AI-agent control path to a behavior-bearing write operation. anned-install') : (after.repoid && sourcedigest === installeddigest ? 'verified' : 'mismatch') if (!dryrun && status !== 'verified') { const error = new error('grok_plugin_install_mismatch: installed plugin bytes differ from workspace owner') error.code = 'grok_plugin_install_mismatch' throw error } return { schemaversion: 'grokplugininstallationreceiptv1', status, pluginpath: portable(source), repoid: after.repoid, installedpath: installedpath ? portable(installedpath) : null, sourcedigest, installeddigest, grokversion: string(probe.stdout || probe.stderr || '').trim(), refreshmode, dryrun } } function timestampsu

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/host-adapter-scope.jsView on unpkg

hooks/_runtime/stdio-bounds.cjsView file

•stage = ast_semantic_analysis; reason = ast_alias_growth_limit_exceeded; limitedFiles = 2

High

Semantic Analysis Limited

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

hooks/_runtime/stdio-bounds.cjsView on unpkg

scripts/lib/global-host-runtime-verifier.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.18.1 matchedPath = scripts/lib/global-host-runtime-verifier.js matchedIdentity = npm:ZGV2Y29kZXg:1.18.1 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/global-host-runtime-verifier.jsView on unpkg

scripts/test-runtime-rolling-upgrade.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.18.1 matchedPath = scripts/test-runtime-rolling-upgrade.js matchedIdentity = npm:ZGV2Y29kZXg:1.18.1 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-runtime-rolling-upgrade.jsView on unpkg

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

•matchType = normalized_sha256 matchedPackage = devcodex@1.18.1 matchedPath = scripts/lib/node-runtime-readiness.js matchedIdentity = npm:ZGV2Y29kZXg:1.18.1 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/test-derived-state-lock-concurrency.jsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.18.1 matchedPath = scripts/test-derived-state-lock-concurrency.js matchedIdentity = npm:ZGV2Y29kZXg:1.18.1 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

grok/plugins/devcodex-workspace/mcp/workspace-bridge.cjsView file

•matchType = normalized_sha256 matchedPackage = devcodex@1.18.1 matchedPath = grok/plugins/devcodex-workspace/mcp/workspace-bridge.cjs matchedIdentity = npm:ZGV2Y29kZXg:1.18.1 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.

grok/plugins/devcodex-workspace/mcp/workspace-bridge.cjsView on unpkg