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@polymorphism-tech/morph-spec@8.43.0: AI-agent control-surface | LPM Firewall

registry / @polymorphism-tech/morph-spec / 8.43.0

@polymorphism-tech/morph-spec@8.43.0

MORPH-SPEC: NLH (Natural Language Harness) for spec-driven development with Claude Code

AI Security Review

scanned 9d ago · by lpm-firewall-ai

LPM flags this version as an AI-agent control-surface risk. Automatic npm installation changes Claude Code's global command configuration without consent. It replaces any existing statusline command with the package's command.

Static reason

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

Trigger

npm installation with lifecycle scripts enabled.

Impact

Changes agent behavior across projects and can overwrite the user's existing statusline configuration.

Mechanism

Postinstall invokes global statusline setup, which copies scripts into .claude and merges a command-valued statusLine into global settings using real filesystem writes.

Policy narrative

The published postinstall hook calls global statusline installation automatically. That function selects the user's global Claude directory and registers a package-supplied executable command. The underlying settings merge overwrites any existing statusLine value without asking permission. This crosses the supplied policy boundary for unconsented install-time mutation of a foreign, global AI-agent control surface.

AI rationale

Source proves automatic, unconsented replacement of a command in global Claude settings during npm postinstall. This meets the specified blocking rule even though the command has a package-related display purpose and credential theft was not established.

Evidence

package.jsonsrc/scripts/global-install.jssrc/utils/hooks-installer.jssrc/lib/installers/effects.js~/.claude/settings.json~/.claude/statusline.sh~/.claude/statusline.py

Source & flagged code

20 flagged · loading source

package.jsonView file

•scripts.postinstall = node src/scripts/global-install.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

framework/hooks/claude-code/core/post-edit-typecheck.jsView file

23L24: import { execSync } from 'child_process'; L25: import { readFileSync, writeFileSync, mkdirSync, existsSync } from 'fs';

High

Child Process

Package source references child process execution.

framework/hooks/claude-code/core/post-edit-typecheck.jsView on unpkg · L23

108try { L109: execSync('npx tsc --noEmit', { cwd: root, stdio: 'pipe', timeout: TSC_TIMEOUT_MS }); L110: return null;

High

Runtime Package Install

Package source invokes a package manager install command at runtime.

framework/hooks/claude-code/core/post-edit-typecheck.jsView on unpkg · L108

•matchType = normalized_sha256 matchedPackage = @polymorphism-tech/morph-spec@8.42.0 matchedPath = framework/hooks/claude-code/core/post-edit-typecheck.js matchedIdentity = npm:[redacted]:8.42.0 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.

framework/hooks/claude-code/core/post-edit-typecheck.jsView on unpkg

framework/hooks/shared/morph-cli.jsView file

41L42: /** Quote one argument for cmd.exe (the only shell path this module uses). */ L43: export function quoteForCmd(arg) {

High

Shell

Package source references shell execution.

framework/hooks/shared/morph-cli.jsView on unpkg · L41

bin/morph-spec.jsView file

23// that breaks at import time still fails the suite, not only its own command. L24: const lazy = (path, name) => async (...args) => (await import(path))[name](...args); L25:

Medium

Dynamic Require

Package source references dynamic require/import behavior.

bin/morph-spec.jsView on unpkg · L23

framework/hooks/claude-code/core/validate-completion.jsView file

55recap = readFileSync(recapPath, 'utf-8'); L56: tasksJson = JSON.parse(readFileSync(tasksJsonPath, 'utf-8')); L57: } catch { ... L143: // Prevent infinite loop L144: if (process.env.MORPH_STOP_HOOK_ACTIVE === '1') return null; L145: ... L153: const { name, feature } = active; L154: const cwd = process.cwd(); L155: const warnings = [];

Low

Weak Crypto

Package source references weak cryptographic algorithms.

framework/hooks/claude-code/core/validate-completion.jsView on unpkg · L55

src/utils/hooks-installer.jsView file

14import { homedir } from 'os'; L15: import { execSync } from 'child_process'; L16: import { realEffects } from '../lib/installers/effects.js'; ... L188: // (measured: all three fire it). The hook prints the created path as its L189: // last stdout line; a non-zero exit fails the creation. No matcher exists L190: // for this event. 120s: it spawns the morph-spec CLI (setup or provision), ... L365: try { L366: settings = JSON.parse(await readFile(settingsPath, 'utf-8')); L367: } catch { ... L456: // JSON Schema for IDE auto-complete and validation L457: settings['$schema'] = 'https://json.schemastore.org/claude-code-settings.json'; L458:

High

Sandbox Evasion Gated Capability

Source gates dangerous network, credential, or execution behavior behind CI, host, platform, time, or geo fingerprint checks.

src/utils/hooks-installer.jsView on unpkg · L14

src/scripts/global-install.jsView file

48} else { L49: await mkdir(dirname(profilePath), { recursive: true }); L50: } ... L73: label: 'statusline', L74: path: '~/.claude/', L75: error: statuslineResult.reason?.message,

Critical

Ai Agent Control Hijack

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

src/scripts/global-install.jsView on unpkg · L48

•Runtime or CLI code links a write operation to an explicit external AI-agent control path: ll_profile.ps1'); const psprofilelegacy = join(homedir(), 'documents', 'windowspowershell', 'microsoft.powershell_profile.ps1'); const marker = '# morph-spec: ensure npm global in path'; const snippet = [ marker, `if ($env:path -notlike "*${npm[redacted](/\\/g, '\\\\')}*") {`, ` $env:path += ";${npmglobaldir}"`, '}', '# end morph-spec path', ].join('\n'); for (const profilepath of [psprofile, psprofilelegacy]) { try { let content = ''; if (existssync(profilepath)) { content = await readfile(profilepath, 'utf8'); if (content.includes(marker)) continue; } else { await mkdir(dirname(profilepath), { recursiv

High

External Ai Agent Control Surface Mutation

Runtime or CLI source writes behavior-bearing configuration into a user or project AI-agent control surface.

src/scripts/global-install.jsView on unpkg

framework/hooks/claude-code/statusline.pyView file

•path = framework/hooks/claude-code/statusline.py kind = build_helper sizeBytes = 28396 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

framework/hooks/claude-code/statusline.pyView on unpkg

framework/templates/code/typescript/contracts.tsView 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.

framework/templates/code/typescript/contracts.tsView on unpkg

src/commands/dashboard/dashboard.jsView file

•matchType = normalized_sha256 matchedPackage = @polymorphism-tech/morph-spec@8.42.0 matchedPath = [redacted].js matchedIdentity = npm:[redacted]:8.42.0 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.

src/commands/dashboard/dashboard.jsView on unpkg

framework/templates/project/validate.jsView file

•matchType = normalized_sha256 matchedPackage = @polymorphism-tech/morph-spec@8.42.0 matchedPath = [redacted].js matchedIdentity = npm:[redacted]:8.42.0 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.

framework/templates/project/validate.jsView on unpkg

src/lib/worktree/fleet-scanner.jsView file

•matchType = normalized_sha256 matchedPackage = @polymorphism-tech/morph-spec@8.42.0 matchedPath = src/lib/worktree/fleet-scanner.js matchedIdentity = npm:[redacted]:8.42.0 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.

src/lib/worktree/fleet-scanner.jsView on unpkg

src/utils/version-checker.jsView file

•matchType = normalized_sha256 matchedPackage = @polymorphism-tech/morph-spec@8.42.0 matchedPath = src/utils/version-checker.js matchedIdentity = npm:[redacted]:8.42.0 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.

src/utils/version-checker.jsView on unpkg

framework/hooks/claude-code/core/telemetry-log.jsView file

•matchType = normalized_sha256 matchedPackage = @polymorphism-tech/morph-spec@8.42.0 matchedPath = framework/hooks/claude-code/core/telemetry-log.js matchedIdentity = npm:[redacted]:8.42.0 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.

framework/hooks/claude-code/core/telemetry-log.jsView on unpkg

src/commands/state/create.jsView file

•matchType = normalized_sha256 matchedPackage = @polymorphism-tech/morph-spec@8.42.0 matchedPath = src/commands/state/create.js matchedIdentity = npm:[redacted]:8.42.0 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.

src/commands/state/create.jsView on unpkg

src/lib/generators/architecture-scanner.jsView file

•matchType = normalized_sha256 matchedPackage = @polymorphism-tech/morph-spec@8.42.0 matchedPath = src/lib/generators/architecture-scanner.js matchedIdentity = npm:[redacted]:8.42.0 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.

src/lib/generators/architecture-scanner.jsView on unpkg

src/lib/validators/ui/ui-contrast-validator.jsView file

•matchType = normalized_sha256 matchedPackage = @polymorphism-tech/morph-spec@8.42.0 matchedPath = src/lib/validators/ui/ui-contrast-validator.js matchedIdentity = npm:[redacted]:8.42.0 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.

src/lib/validators/ui/ui-contrast-validator.jsView on unpkg