registry / AI-agent capability abuse / open-walnut / 0.6.8

open-walnut@0.6.8

Personal AI powered by Claude — task management, Claude Code sessions, memory system, and web UI

AI Security Review

scanned 12d ago · by lpm-firewall-ai

The install hook makes a concrete, version-checked change to an AI agent safety prompt by removing its malware-related safeguard. The source supports a warning for this capability change, but not a block for broad control-surface hijacking or other concrete attack behavior.

Static reason

One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review

Trigger

npm installation runs the package postinstall hook.

Impact

The SDK no longer receives that reminder when reading files, weakening a safety instruction for malware-related work.

Mechanism

The hook reads the installed SDK CLI and replaces the exact old patch text with the shipped replacement when the version and patch context match.

AI rationale

Evidence

scripts/postinstall.mjspatches/@anthropic-ai+claude-agent-sdk+0.2.50.patch@anthropic-ai/claude-agent-sdk/cli.js

Decision evidence

public snapshot

AI called this Suspicious at 91.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

package.json runs scripts/postinstall.mjs during installation.
The postinstall hook changes the installed Claude Agent SDK cli.js after checking the patch context.
The shipped patch removes a system reminder telling the SDK to consider malware risks and refuse to improve malware.
The flagged agent-related excerpts are configuration paths or context-file lookups, not evidence of broad agent-control writes.
The flagged web assets contain syntax-highlighting code, and the flagged daemon service excerpt contains WebSocket protocol code.

Evidence against

The SDK edit is narrowly scoped to a version-matched dependency file and skips when the expected patch context is absent.
The inspected excerpts do not establish credential collection, exfiltration, or remote payload execution.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsEvalFilesystemNetworkShellWebSocket

Source & flagged code

17 flagged

package.jsonView file

•scripts.postinstall = node scripts/postinstall.mjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•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

dist/plugin-store/walnut-rhythm/dist/server.mjsView file

8// plugin-store/walnut-rhythm/src/server/exec.ts L9: import { execFile } from "node:child_process"; L10: var MAX_BUFFER = 1024 * 1024;

High

Child Process

Package source references child process execution.

dist/plugin-store/walnut-rhythm/dist/server.mjsView on unpkg · L8

dist/workers/git-compaction-worker.jsView file

1256var NETWORK_GIT_RE = /^(?:clone|fetch|pull|push|ls-remote)\b/; L1257: var execAsync = promisify2(exec); L1258: function credentialGuardArgs(cwd) {

High

Shell

Package source references shell execution.

dist/workers/git-compaction-worker.jsView on unpkg · L1256

dist/web/static/assets/pptx-preview.es-TzHr_Xq6.jsView file

77`+x.message)}var a=new Lt;a.add(n),a.isGeoSVGGraphicRoot=!0;var i=t.width,o=t.height,s=t.viewBoxRect,l=this._boundingRect;if(!l){var u=void 0,c=void 0,h=void 0,v=void 0;if(i!=null?... L78: `+i.message)}return ij(t,a),R(a,function(i){var o=i.name;sj(t,i),uj(t,i);var s=this._specialAreas&&this._specialAreas[o];s&&i.transformTo(s.left,s.top,s.width,s.height)},this),a},r... L79: `))}),e.join(`

Low

Eval

Package source references a known benign dynamic code generation pattern.

dist/web/static/assets/pptx-preview.es-TzHr_Xq6.jsView on unpkg · L77

bin/open-walnut.jsView file

63} L64: import(entryPath.href).catch((err) => { L65: process.stderr.write(`walnut: cannot load ${entry}: ${err && err.message ? err.message : err}\n`);

Medium

Dynamic Require

Package source references dynamic require/import behavior.

bin/open-walnut.jsView on unpkg · L63

dist/daemon-binaries/daemon-service-cli.cjsView file

1var Ln=Object.create;var{getPrototypeOf:In,defineProperty:Re,getOwnPropertyNames:Xt,getOwnPropertyDescriptor:Rn}=Object,wt=Object.prototype.hasOwnProperty;function Zt(e){return thi... L2: `).join(`\r ... L6: \r L7: `+r)}function we(e,t,r,n,i,s){if(e.listenerCount("wsClientError")){let c=Error(i);Error.captureStackTrace(c,we),e.emit("wsClientError",c,r,t)}else Ge(r,n,i,s)}});var Us={};Bn(Us,{d... L8: `)}function ae(e){return e.replace(/&/g,"&").replace(/</g,"<").replace(/>/g,">").replace(/"/g,""").replace(/'/g,"'")}function an(e,t){let r=e==="linux"?/^ExecSt...

High

Same File Env Network Execution

A single source file combines environment access, network access, and code or shell execution; review context before blocking.

dist/daemon-binaries/daemon-service-cli.cjsView on unpkg · L1

High

Command Output Exfiltration

Source combines command execution, command-output handling, and outbound requests; review data flow before blocking.

dist/daemon-binaries/daemon-service-cli.cjsView on unpkg · L1

dist/daemon-binaries/dtach-linux-x64View file

•path = dist/daemon-binaries/dtach-linux-x64 kind = native_binary sizeBytes = 731144 magicHex = [redacted]

Medium

Ships Native Binary

Package ships native binary artifacts.

dist/daemon-binaries/dtach-linux-x64View on unpkg

dist/data/skills/walnut-register-repo/scripts/validate-repo.pyView file

•path = dist/data/skills/walnut-register-repo/scripts/validate-repo.py kind = build_helper sizeBytes = 5994 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

dist/data/skills/walnut-register-repo/scripts/validate-repo.pyView on unpkg

dist/web/server.jsView file

•path = dist/web/server.js kind = oversized_source_file sizeBytes = 11471376 magicHex = [redacted]

Medium

Oversized Source File

Package contains source files above the normal full-analysis size ceiling.

dist/web/server.jsView on unpkg

dist/cli.jsView file

•path = dist/cli.js kind = oversized_cli_entrypoint sizeBytes = 11664399 magicHex = [redacted]

Medium

Oversized Cli Entrypoint

Package contains an oversized executable-looking CLI entrypoint.

dist/cli.jsView on unpkg

dist/cli-fast.jsView file

•stage = ast_semantic_analysis; reason = ast_alias_growth_limit_exceeded; limitedFiles = 7

High

Semantic Analysis Limited

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

dist/cli-fast.jsView on unpkg

dist/daemon-binaries/pi-acp.jsView file

•matchType = normalized_sha256 matchedPackage = open-walnut@0.5.0 matchedPath = dist/daemon-binaries/pi-acp.js matchedIdentity = npm:b3Blbi13YWxudXQ:0.5.0 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.

dist/daemon-binaries/pi-acp.jsView on unpkg

dist/web/static/assets/sql-D0XecflT.jsView file

•matchType = normalized_sha256 matchedPackage = open-walnut@0.5.0 matchedPath = dist/web/static/assets/sql-D0XecflT.js matchedIdentity = npm:b3Blbi13YWxudXQ:0.5.0 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.

dist/web/static/assets/sql-D0XecflT.jsView on unpkg

dist/web/static/assets/vbscript-BuJXcnF6.jsView file

•matchType = normalized_sha256 matchedPackage = open-walnut@0.5.0 matchedPath = dist/web/static/assets/vbscript-BuJXcnF6.js matchedIdentity = npm:b3Blbi13YWxudXQ:0.5.0 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.

dist/web/static/assets/vbscript-BuJXcnF6.jsView on unpkg

Source & flagged code

17 flagged · loading source

package.jsonView file

•scripts.postinstall = node scripts/postinstall.mjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•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

dist/plugin-store/walnut-rhythm/dist/server.mjsView file

8// plugin-store/walnut-rhythm/src/server/exec.ts L9: import { execFile } from "node:child_process"; L10: var MAX_BUFFER = 1024 * 1024;

High

Child Process

Package source references child process execution.

dist/plugin-store/walnut-rhythm/dist/server.mjsView on unpkg · L8

Findings

9 High9 Medium7 Low

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processdist/plugin-store/walnut-rhythm/dist/server.mjs

HighShelldist/workers/git-compaction-worker.js

HighSame File Env Network Executiondist/daemon-binaries/daemon-service-cli.cjs

HighCommand Output Exfiltrationdist/daemon-binaries/daemon-service-cli.cjs

HighSemantic Analysis Limiteddist/cli-fast.js

HighKnown Malware Source Similaritydist/daemon-binaries/pi-acp.js

HighKnown Malware Source Similaritydist/web/static/assets/sql-D0XecflT.js

HighKnown Malware Source Similaritydist/web/static/assets/vbscript-BuJXcnF6.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

Medium

Affected versions and remediation

This report applies to open-walnut@0.6.8.

See all versions of open-walnut for other recorded verdicts.

Review the evidence and your use of open-walnut@0.6.8 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: 2026-10-11 01:06:35.992Z (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