registry / @siwatfa/yorn / 0.0.25

@siwatfa/yorn@0.0.25

AI Security Review

scanned 2h ago · by lpm-firewall-ai

No confirmed malicious attack surface. The distributed entrypoint is a user-invoked AI coding-agent CLI.

Static reason

One or more suspicious static signals were detected.

Trigger

User runs the yorn command.

Impact

No unconsented install-time mutation, credential theft, or exfiltration was confirmed.

Mechanism

AI-provider and self-update CLI functionality

Rationale

Static inspection found a bundled coding-agent CLI with documented provider, extension, and self-update capabilities, but no install-time execution or concrete malicious chain. Scanner findings conflate expected CLI/provider behavior with malware indicators.

Evidence

package.jsondist/cli.jsREADME.md

OSV Corroboration

OpenSSF/OSV

Advisory

MAL-2026-14102

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in @siwatfa/yorn (npm)

Details

The package was found to contain malicious code or consuming dependency that contains malicious code ## Source: ghsa-malware (dc765ce6cbae92d77218173fda23eca5505d5dc8342010b79f87ad721aac882a) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

References

OSV advisory ADVISORY PACKAGE PACKAGE PACKAGE PACKAGE PACKAGE PACKAGE

Decision evidence

public snapshot

AI called this Clean at 88.0% confidence as Benign with low false-positive risk.

Evidence for block

Manifest exposes a user-invoked yorn CLI.
Only prepublishOnly runs, and it builds before publishing.
CLI self-update targets its own global package install.

Evidence against

No preinstall, install, or postinstall hook exists.
No source-confirmed credential harvesting or exfiltration chain was found.
Network and child-process functionality is consistent with an AI coding-agent CLI and its documented provider/update features.

Behavioral surface

Source

ChildProcessDynamicRequireEnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStringsMinifiedProtestwareUrlStrings

ManifestNo manifest risk signals triggered.

scanned 0 file(s), 256 KB of source, external domains: 127.0.0.1, feross.org, github.com, huggingface.co, jimmy.warting.se

Oversized source lightweight scan

Source & flagged code

14 flagged

dist/cli.jsView file

High

Child Process

Package source references child process execution.

dist/cli.jsView on unpkg · L2

2import { createRequire as __createRequire } from 'module'; const require = __createRequire(import.meta.url); L3: var APt=Object.create;var P3=Object.defineProperty;var IPt=Object.getOwnPropertyDescriptor;var RPt=Object.getOwnPropertyNames;var PPt=Object.getPrototypeOf,kPt=Object.prototype.has... L4: \r `.includes(t[r]);)r++};return o()},SFt=IOe;Wl.parse=SFt});var IN,vf,_Fe=ae(()=>{IN={warningEmitted:!1},vf=t=>{if(t&&!IN.warningEmitted){if(process.env.AWS_SDK_JS_NODE_VERSION_SU... ... L10: L11: More information can be found at: https://a.co/c895JFp`))}}});var gGt,yGt,SFe,xFe=ae(()=>{gGt=()=>(t,e)=>async n=>(e.__retryLongPoll=!0,t(n)),yGt={name:"longPollMiddleware",tags:["... L12: `+d}catch{!n.logger||n.logger?.constructor?.name==="NoOpLogger"?console.warn(d):n.logger?.warn?.(d)}typeof

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/cli.jsView on unpkg · L2

•Manifest-reachable source captures an API credential, sends it to a fixed unofficial gateway, and persists that redirection in agent or shell configuration. dist/cli.js: `));return n(i)}});var Rq,ch,MGe=ae(()=>{Iq();Rq={step:"serialize",tags:["HTTP_AUTH_SCHEME"],name:"httpAuthSchemeMiddleware",override:!0,relation:"before",toMiddleware:"endpointV2M... `);return this.signString(h,{signingDate:r,signingRegion:l,signingService:o,eventStreamCredentials:a})}async signMessage(e,{signingDate:n=new Date,signingRegion:r,signingService:i,... - EKS container host 169.254.170.23 or [fd00:ec2::23]`,{logger:e})}};function Tjt(t){return new yjt({protocol:t.protocol,hostname:t.hostname,port:Number(t.port),path:t.pathname,que... Set AWS_CONTAINER_CREDENTIALS_FULL_URI or AWS_CONTAINER_CREDENTIALS_RELATIVE_U

High

Credential Redirect Persistence

Manifest-reachable source sends a prompted API credential to a fixed unofficial gateway and persists the redirection.

dist/cli.jsView on unpkg

•Manifest-reachable source resolves another installed package, overwrites its runtime code, and injects package-defined remote behavior. dist/cli.js: var APt=Object.create;var P3=Object.defineProperty;var IPt=Object.getOwnPropertyDescriptor;var RPt=Object.getOwnPropertyNames;var PPt=Object.getPrototypeOf,kPt=Object.prototype.has... More information can be found at: https://a.co/c895JFp`))}}});var gGt,yGt,SFe,xFe=ae(()=>{gGt=()=>(t,e)=>async n=>(e.__retryLongPoll=!0,t(n)),yGt={name:"longPollMiddleware",tags:["... `+a}catch{!r.logger||r.logger?.constructor?.name==="NoOpLogger"?console.warn(a):r.logger?.warn?.(a)}typeof o.$responseBodyText<"u"&&o.$response&&(o.$response.body=o.$responseBodyTe... If you are using React Native, this API is not yet supported, see: https://react-native.canny.io/fe

High

Entrypoint Foreign Package Code Overwrite

Manifest-reachable source overwrites another installed package with package-defined remote behavior.

dist/cli.jsView on unpkg

39For more information, please visit: `+Yqt);let i=t.originalExpiration??t.expiration;return{...t,...i?{originalExpiration:i}:{},expiration:r}},Qqt=(t,e={})=>{let n=e?.logger||consol... L40: See https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/node-configuring-maxsockets.html L41: or increase socketAcquisitionWarningTimeout=(millis) in the NodeHttpHandler config.`),Date.now()}return n}constructor(e){this.configProvider=new Promise((n,r)=>{typeof e=="function... L42: - loopback CIDR 127.0.0.0/8 or [::1/128] ... L54: `)||(u["#text"]="#text"in u?u["#text"]+c:c);for(let c of o)c.tag==="__proto__"&&Sae(u),c.tag in u?Array.isArray(u[c.tag])?u[c.tag].push(c.value):u[c.tag]=[u[c.tag],c.value]:u[c.tag... L55: Reference: https://docs.aws.amazon.com/cli/latest/userguide/cli-config

High

Command Output Exfiltration

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

dist/cli.jsView on unpkg · L39

High

Sandbox Evasion Gated Capability

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

dist/cli.jsView on unpkg · L2

High

Cloud Metadata Access

Source reaches cloud instance metadata or link-local credential endpoints.

dist/cli.jsView on unpkg · L2

2import { createRequire as __createRequire } from 'module'; const require = __createRequire(import.meta.url); L3: var APt=Object.create;var P3=Object.defineProperty;var IPt=Object.getOwnPropertyDescriptor;var RPt=Object.getOwnPropertyNames;var PPt=Object.getPrototypeOf,kPt=Object.prototype.has... L4: \r `.includes(t[r]);)r++};return o()},SFt=IOe;Wl.parse=SFt});var IN,vf,_Fe=ae(()=>{IN={warningEmitted:!1},vf=t=>{if(t&&!IN.warningEmitted){if(process.env.AWS_SDK_JS_NODE_VERSION_SU... ... L77: `;let l=(0,Wtn.parseProxyResponse)(i);i.write(`${a}\r L78: `);let{connect:u,buffered:c}=await l;if(e.emit("proxyConnect",u),this.emit("proxyConnect",u,e),u.statusCode===200)return e.once("socket",Gtn),n.secureEndpoint?(qL("Upgrading socket... L79: `):[]}};Dp=new WeakMap,Lp=new WeakMap;cv.NEWLINE_CHARS

High

Remote Agent Bridge

Source exposes local file and command tools to a remote model endpoint.

dist/cli.jsView on unpkg · L2

39Trigger-reachable command-output exfiltration chain: manifest.bin -> dist/cli.js L39: For more information, please visit: `+Yqt);let i=t.originalExpiration??t.expiration;return{...t,...i?{originalExpiration:i}:{},expiration:r}},Qqt=(t,e={})=>{let n=e?.logger||consol... L40: See https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/node-configuring-maxsockets.html L41: or increase socketAcquisitionWarningTimeout=(millis) in the NodeHttpHandler config.`),Date.now()}return n}constructor(e){this.configProvider=new Promise((n,r)=>{typeof e=="function... L42: - loopback CIDR 127.0.0.0/8 or [::1/128] ... L54: `)||(u["#text"]="#text"in u?u["#text"]+c:c);for(let c of o)c.tag==="__proto__"&&Sae(u),c.tag in u?Array.isArray(u[c.tag])?u[c.tag].push(c.value):u[c.tag]=[u[c.tag],c.value]:u[c.t

High

Trigger Reachable Command Output Exfiltration

A manifest entrypoint or package-local install chain reaches command-output exfiltration behavior.

dist/cli.jsView on unpkg · L39

•stage = ast_semantic_analysis; reason = ast_path_work_budget_exceeded; limitedFiles = 1

High

Semantic Analysis Limited

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

dist/cli.jsView on unpkg

1#!/usr/bin/env node L2: import { createRequire as __createRequire } from 'module'; const require = __createRequire(import.meta.url); L3: var APt=Object.create;var P3=Object.defineProperty;var IPt=Object.getOwnPropertyDescriptor;var RPt=Object.getOwnPropertyNames;var PPt=Object.getPrototypeOf,kPt=Object.prototype.has...

Medium

Dynamic Require

Package source references dynamic require/import behavior.

dist/cli.jsView on unpkg · L1

•path = dist/cli.js kind = oversized_source_file sizeBytes = 6508671 magicHex = [redacted]

Medium

Oversized Source File

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

dist/cli.jsView on unpkg

•path = dist/cli.js kind = oversized_cli_entrypoint sizeBytes = 6508671 magicHex = [redacted]

Medium

Oversized Cli Entrypoint

Package contains an oversized executable-looking CLI entrypoint.

dist/cli.jsView on unpkg

Low

Weak Crypto

Package source references weak cryptographic algorithms.

dist/cli.jsView on unpkg · L2

Source & flagged code

14 flagged · loading source

dist/cli.jsView file

High

Child Process

Package source references child process execution.

dist/cli.jsView on unpkg · L2

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/cli.jsView on unpkg · L2

Findings

10 High7 Medium6 Low

HighChild Processdist/cli.js

HighSame File Env Network Executiondist/cli.js

HighCredential Redirect Persistencedist/cli.js

HighEntrypoint Foreign Package Code Overwritedist/cli.js

HighCommand Output Exfiltrationdist/cli.js

HighSandbox Evasion Gated Capabilitydist/cli.js

HighCloud Metadata Accessdist/cli.js

HighRemote Agent Bridgedist/cli.js

HighTrigger Reachable Command Output Exfiltrationdist/cli.js

HighSemantic Analysis Limiteddist/cli.js

MediumDynamic Requiredist/cli.js

MediumNetwork

MediumEnvironment Vars