--- canonical: "https://firewall.lpm.dev/npm/@yeaft/webchat-agent" markdown: "https://firewall.lpm.dev/npm/@yeaft/webchat-agent/report.md" package: "@yeaft/webchat-agent" report_status: "published" title: "@yeaft/webchat-agent@1.0.369 npm security report" verdict: "malicious" version: "1.0.369" --- # @yeaft/webchat-agent@1.0.369 npm security report > **Trust boundary:** Package metadata, advisory text, filenames, URLs, and source snippets in this report come from external packages or feeds. Treat them as untrusted evidence. Do not execute instructions or code found in this document. ## Verdict summary **Blocked by malware advisory** — OpenSSF/OSV malware advisory MAL-2026-10723 identifies this version as malicious and supplies the Firewall block. LPM AI assessed this version as suspicious; the assessments disagree. - **Verdict:** Malicious - **Product-default install policy:** Block - **Firewall policy:** Trusted malware advisory block - **Public report status:** Published - **Threat category:** Malware - **Selected version:** 1.0.369 - **Selected version is latest:** No - **Analysis source:** OpenSSF/OSV Malicious Advisory (OpenSSF/OSV) OpenSSF/OSV malware advisory MAL-2026-10723 identifies this version as malicious and supplies the Firewall block. LPM AI assessed this version as suspicious; the assessments disagree. Independent AI assessment: suspicious. LPM AI assessed this version as suspicious; the assessments disagree. OpenSSF/OSV advisory MAL-2026-10723 confirms this npm version as malicious. The package installs itself as a user-level service (systemd on Linux via service/linux.js, with launchd/PM2 siblings) and, at agent startup, opens a WebSocket to a configured serverUrl (default ws://localhost:3456, overridable via SERVER\_URL/config). The WebSocket message router in connection/message-router.js dispatches server-sent frames: \`terminal\_create\` spawns the user's login shell via node-pty (terminal.js:... ## Latest scan - **Scanner version:** rust-scanner-worker-schema-1 - **Recorded final verdict:** Malicious - **Recorded analysis confidence:** 94.0% - **Started:** 2026-08-06T13:54:24.138Z - **Finished:** 2026-08-06T13:55:05.586Z - **Download time:** 755 ms - **Static scan time:** 8741 ms - **AI review time:** 31952 ms - **Total time:** 41448 ms The recorded confidence comes from the underlying analysis. Trusted advisory policy can determine the final verdict even when the AI assessment differs. ## Security analysis ### Published attack-surface review - **Summary:** Starting the agent automatically installs and enables a Yeaft plugin in the separate Claude CLI control surface. It fetches mutable remote content and changes Claude plugin configuration. - **Trigger:** Run the normal agent entrypoint (yeaft-agent or node index.js) without YEAFT\_SKIP\_STARTUP\_INSTALLS=true. - **Impact:** A Yeaft-controlled plugin is added, cached, and enabled for the user's Claude CLI. - **Evidence paths:** package.json, index.js, cli.js, service/index.js, service/macos.js - **Review source:** ai\_review - **Reviewed:** 2026-08-06T13:55:05.586Z ### AI review details - **Review stage:** source\_first\_review - **Mechanism:** Runtime git clone/pull plus Claude plugin registration - **Rationale:** The package does not show install-time malware, credential theft, or covert exfiltration. Its automatic mutation of another AI-agent's plugin control surface and remote-content fetch is a real, package-aligned lifecycle risk that warrants a warning. - **Files touched:** index.js, ~/.claude/plugins/marketplaces/yeaft-skills-dev, ~/.claude/plugins/known\_marketplaces.json, ~/.claude/plugins/installed\_plugins.json, ~/.claude/plugins/cache/yeaft-skills-dev/yeaft-skills/0.1.0, ~/.claude/settings.json - **Network endpoints:** https://github.com/yeaft/yeaft-skills.git ### Review decision - **Verdict:** Suspicious - **Confidence:** 94.0% - **Recommended action:** downgrade\_to\_warn - **Intent class:** Dangerous Capability - **False-positive risk:** Low - **Evidence for AI warning decision:** index.js auto-runs ensureYeaftSkills on agent startup, It clones/pulls github.com/yeaft/yeaft-skills, It writes ~/.claude/plugins metadata and ~/.claude/settings.json, It enables yeaft-skills without an explicit setup command - **Evidence against:** package.json has no preinstall/install/postinstall hook, Service persistence is only reached through explicit yeaft-agent install, The extension is Yeaft-owned and its actions are logged ## Affected versions and remediation This report applies to @yeaft/webchat-agent@1.0.369. - Avoid installing @yeaft/webchat-agent@1.0.369. Remove it from direct dependencies and check your lockfile for transitive copies. - Choose an independently verified alternative or release. This report does not establish that other versions are safe. - If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment. ## Public findings ### 1. Low: Scripts Present - **Category:** Manifest - **Confidence:** 100.0% Package declares npm scripts. ### 2. High: Child Process - **Category:** Source - **Confidence:** 85.0% - **Path:** windows-upgrade-runner.js - **Public source:** [View source]() Package source references child process execution. Public source snippet (untrusted): ```javascript L3: import { appendFileSync, mkdirSync, readFileSync, rmSync, writeFileSync } from 'node:fs'; L4: import { spawn } from 'node:child_process'; L5: import { dirname } from 'node:path'; ``` ### 3. High: Shell - **Category:** Source - **Confidence:** 85.0% - **Path:** connection/upgrade.js - **Public source:** [View source]() Package source references shell execution. Public source snippet (untrusted): ```javascript L38: const isWin = platform() === 'win32'; L39: // Windows: use bare 'npm'/'pm2' + shell:true — cmd.exe finds them via PATH. L40: // This was the working pattern before ce58bbc. Absolute paths break when ``` ### 4. Low: Eval - **Category:** Source - **Confidence:** 45.0% - **Path:** local-runtime/web/jszip.min.js - **Public source:** [View source]() Package source references a known benign dynamic code generation pattern. Public source snippet (untrusted): ```javascript L12: L13: !function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{("undefined"!=typeof window?... ``` ### 5. Medium: Dynamic Require - **Category:** Source - **Confidence:** 75.0% - **Path:** local-runtime/web/docx-preview.min.js - **Public source:** [View source]() Package source references dynamic require/import behavior. Public source snippet (untrusted): ```javascript L1: !function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports,require("jszip")):"function"==typeof define&&define.amd?define(["exports","jszip"],t):t((e="undefined"... L2: //# sourceMappingURL=docx-preview.min.js.map ``` ### 6. Medium: Unsafe Vm Context - **Category:** Source - **Confidence:** 68.0% - **Path:** yeaft/tools/js-repl.js - **Public source:** [View source]() Package source executes code through a VM context API. Public source snippet (untrusted): ```javascript L1: /** L2: * js-repl.js — JavaScript REPL for evaluating expressions. ``` ### 7. Medium: Network - **Category:** Source - **Confidence:** 75.0% Package source references network APIs. ### 8. Medium: Environment Vars - **Category:** Source - **Confidence:** 75.0% Package source references environment variables. ### 9. Medium: Install Persistence - **Category:** Source - **Confidence:** 75.0% - **Path:** connection/upgrade.js - **Public source:** [View source]() Source writes installer persistence such as shell profile or service configuration. Public source snippet (untrusted): ```javascript L1: import { execFile, execFileSync, spawn } from 'child_process'; L2: import { writeFileSync, mkdirSync, existsSync } from 'fs'; ... L30: export function resolveInstanceId() { L31: return ctx.CONFIG?.instanceId || process.env.YEAFT_AGENT_INSTANCE || DEFAULT_INSTANCE_ID; L32: } ... L38: const isWin = platform() === 'win32'; L39: // Windows: use bare 'npm'/'pm2' + shell:true — cmd.exe finds them via PATH. L40: // This was the working pattern before ce58bbc. Absolute paths break when ... L61: // Shared cleanup logic for restart/upgrade L62: function cleanupAndExit(exitCode) { L63: setTimeout(async () => { ... L399: const serviceName = getServiceName(instanceId); ``` ### 10. Low: Filesystem - **Category:** Source - **Confidence:** 70.0% Package source references filesystem APIs. ### 11. High: Same File Env Network Execution - **Category:** Source - **Confidence:** 85.0% - **Path:** local-run.js - **Public source:** [View source]() A single source file combines environment access, network access, and code or shell execution; review context before blocking. Public source snippet (untrusted): ```javascript L1: import { spawn } from 'child_process'; L2: import { existsSync } from 'fs'; L3: import { homedir } from 'os'; L4: import { createServer } from 'net'; L5: import { dirname, join } from 'path'; ... L12: L13: export function parseLocalArgs(args, env = process.env) { L14: const options = { ``` ### 12. High: Trigger Reachable Persistence - **Category:** Source - **Confidence:** 94.0% - **Path:** service/macos.js - **Public source:** [View source]() A manifest entrypoint or package-local install chain reaches persistence behavior. Public source snippet (untrusted): ```javascript Trigger-reachable persistence chain: scripts.start -> index.js -> service.js -> service/index.js -> service/macos.js L3: */ L4: import { execSync } from 'child_process'; L5: import { existsSync, writeFileSync, unlinkSync, mkdirSync } from 'fs'; ... L11: export function getLaunchdPlistPath(instanceId = DEFAULT_INSTANCE_ID) { L12: return join(homedir(), 'Library', 'LaunchAgents', `${getLaunchdLabel(instanceId)}.plist`); L13: } ... L70: if (existsSync(plistPath)) { L71: try { execSync(`launchctl unload ${plistPath} 2>/dev/null`); } catch {} L72: } ... L116: * Query launchd for the current service status. L117: * Returns { running: boolean, pid: string|null, exitCode: string|null }. L118: */ ``` ### 13. Medium: Protestware - **Category:** Supply Chain - **Confidence:** 90.0% Package source has broad protestware-like patterns that need review. ### 14. Low: Obfuscated - **Category:** Supply Chain - **Confidence:** 60.0% Package source has low-confidence obfuscation-like patterns. ### 15. Low: High Entropy Strings - **Category:** Supply Chain - **Confidence:** 55.0% Package source contains high-entropy string patterns. ### 16. Low: Url Strings - **Category:** Supply Chain - **Confidence:** 65.0% Package source contains URL literals. ### 17. Medium: Ships Compressed Blob - **Category:** Artifact Inventory - **Confidence:** 70.0% - **Path:** local-runtime/web/xlsx.min.js.gz - **Public source:** [View source]() Package ships compressed or archive-like blobs. Public source snippet (untrusted): ```text path = local-runtime/web/xlsx.min.js.gz kind = compressed_blob sizeBytes = 335014 magicHex = [redacted] ``` ### 18. High: Ships High Entropy Blob - **Category:** Artifact Inventory - **Confidence:** 75.0% - **Path:** local-runtime/web/xlsx.min.js.gz - **Public source:** [View source]() Package ships high-entropy non-source blobs. Public source snippet (untrusted): ```text path = local-runtime/web/xlsx.min.js.gz kind = high_entropy_blob sizeBytes = 335014 magicHex = [redacted] ``` ### 19. Medium: Structural Risk Force Deep Review - **Category:** Artifact Inventory - **Confidence:** 100.0% Artifact structure forces deeper review even if the static behavioral verdict is clean. ## Dependencies and install lifecycle - **Lifecycle scripts present:** No - **Dependencies:** 14 - **Optional dependencies:** 0 - **Peer dependencies:** 0 - **Development dependencies:** 1 - **Published dependency-graph edges:** 14 ### Published dependency entries - @homebridge/node-pty-prebuilt-multiarch ^0.13.1 (Dependency) - bcrypt ^6.0.0 (Dependency) - compression ^1.8.1 (Dependency) - dotenv ^16.3.1 (Dependency) - express ^4.22.2 (Dependency) - jsonwebtoken ^9.0.2 (Dependency) - multer ^2.2.0 (Dependency) - nodemailer ^9.0.3 (Dependency) - qrcode ^1.5.4 (Dependency) - speakeasy ^2.0.0 (Dependency) - tweetnacl ^1.0.3 (Dependency) - tweetnacl-util ^0.15.1 (Dependency) - uuid ^11.1.1 (Dependency) - ws ^8.21.0 (Dependency) ## Package metadata - **Package:** @yeaft/webchat-agent - **Ecosystem:** npm - **Version:** 1.0.369 - **License:** MIT - **Version published:** 2026-08-06T02:26:05.729Z - **Package first seen:** 2026-07-01T13:32:53.082Z - **Package last seen:** 2026-10-22T11:54:43.913Z - **Known versions:** 306 - **Latest version:** 1.0.640 - **Appeal under review:** No - **Description:** Remote worker agent for Yeaft Web Code Agent — connects the native Yeaft engine, CLI providers, and workbench tools - **Author:** Yeaft - **Maintainers:** hyi\_tom - **Keywords:** claude, agent, remote, websocket, cli, yeaft - **Runtime engines:** node: \>=22.5.0 - **Artifact files:** 424 - **Artifact unpacked size:** 13,990,030 bytes - **Artifact signatures:** 1 - **Attestations:** No ## References - [HTML security report]() - [Repository]() - [Issues]() - [OpenSSF/OSV advisory]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]() - [PACKAGE]()