Summary
@anthropic-ai/claude-code v2.1.84 was classified as CRITICAL RISK with a risk score of 5980. Sigil detected 403 findings across 27 files, covering phases including install hooks, code patterns, network exfiltration, credential access, obfuscation, provenance. Review the findings below before installing this package.
v2.1.84
27 March 2026, 01:17 UTC
by Sigil Bot
Risk Score
5980
Findings
403
Files Scanned
27
Provenance
Findings by Phase
Phase Ordering
Phases are ordered by criticality, with the most dangerous at the top. Click any phase header to expand or collapse its findings. Critical phases are expanded by default.
install-pip-setup-exec
CRITICALsetup.py executes code at install time
package/cli.js:440
See the troubleshooting guide for more information: https://aka.ms/azsdk/js/identity/azurepipelinescredential/troubleshoot`;throw LR.error(K),new Vq(K)}return LR.info("Invoking getToken() of Client Assertion Credential"),this.clientAssertionCredential.getToken(A,q)}async requestOidcToken(A,q){LR.info("Requesting OIDC token from Azure Pipelines..."),LR.info(A);let K=oE({url:A,method:"POST",headers:Jl({"Content-Type":"application/json",Authorization:`Bearer ${q}`,"X-TFS-FedAuthRedirect":"SupWhy was this flagged?
This setup.py calls subprocess, os.system, exec, or eval during package installation. Legitimate packages rarely need to execute arbitrary commands at install time. This pattern is commonly used by malicious packages to download and run payloads, exfiltrate environment variables, or establish persistence. Rated CRITICAL because it runs with the installer's full permissions.
install-pip-setup-exec
CRITICALsetup.py executes code at install time
package/cli.js:2813
`+K.join(`
`)+`
}`}return _.toString=z,_}Jd1.verbose=!1});var Qoq=m((zC$,Uoq)=>{Uoq.exports=pa6;var TN_=cF1(),kN_=nF1(),Md1=kN_("fs");function pa6(A,q,K){if(typeof q==="function")K=q,q={};else if(!q)q={};if(!K)return TN_(pa6,this,A,q);if(!q.xhr&&Md1&&Md1.readFile)return Md1.readFile(A,function(z,Y){return z&&typeof XMLHttpRequest<"u"?pa6.xhr(A,q,K):z?K(z):K(null,q.binary?Y:Y.toString("utf8"))});return pa6.xhr(A,q,K)}pa6.xhr=function(q,K,_){var z=new XMLHttpRequest;if(z.onreadystatechange=funWhy was this flagged?
This setup.py calls subprocess, os.system, exec, or eval during package installation. Legitimate packages rarely need to execute arbitrary commands at install time. This pattern is commonly used by malicious packages to download and run payloads, exfiltrate environment variables, or establish persistence. Rated CRITICAL because it runs with the installer's full permissions.
install-pip-setup-exec
CRITICALsetup.py executes code at install time
package/cli.js:2826
`+q);let K;try{K=hr.Metadata.fromHttp2Headers(A)}catch(Y){K=new hr.Metadata}let _=K.getMap(),z;if(typeof _["grpc-status"]==="string"){let Y=Number(_["grpc-status"]);this.trace("received status code "+Y+" from server"),K.remove("grpc-status");let w="";if(typeof _["grpc-message"]==="string"){try{w=decodeURI(_["grpc-message"])}catch($){w=_["grpc-message"]}K.remove("grpc-message"),this.trace('received status details string "'+w+'" from server')}z={code:Y,details:w,metadata:K}}else if(this.httpStatusWhy was this flagged?
This setup.py calls subprocess, os.system, exec, or eval during package installation. Legitimate packages rarely need to execute arbitrary commands at install time. This pattern is commonly used by malicious packages to download and run payloads, exfiltrate environment variables, or establish persistence. Rated CRITICAL because it runs with the installer's full permissions.
install-makefile-curl
HIGHMakefile/script pipes remote content to shell
package/cli.js:1445
]`,`[\\[\\]\\.,\\+\\-<> \r
]`,{returnEnd:!0,relevance:0}),{className:"title",begin:"[\\[\\]]",relevance:0},{className:"string",begin:"[\\.,]",relevance:0},{begin:/(?:\+\+|--)/,contains:[q]},q]}}DMq.exports=jl9});var ZMq=m((riw,WMq)=>{function Hl9(A){if(!A)return null;if(typeof A==="string")return A;return A.source}function Jl9(A){return cb1("(?=",A,")")}function rT8(A){return cb1("(",A,")?")}function cb1(...A){return A.map((K)=>Hl9(K)).join("")}function Ml9(A){let q=A.COMMENT("//","$",{contains:Why was this flagged?
A script or Makefile pipes content from a remote URL directly into a shell (curl | sh or wget | bash). This is inherently dangerous because the remote content can change at any time, and the command runs with the current user's permissions. Rated HIGH because it requires manual execution (unlike install hooks) but still executes arbitrary remote code.
Badge
Markdown
[](https://sigilsec.ai/scans/117B0B47-C0A1-4A86-B706-ACFC04D33EA6)HTML
<a href="https://sigilsec.ai/scans/117B0B47-C0A1-4A86-B706-ACFC04D33EA6"><img src="https://sigilsec.ai/badge/npm/@anthropic-ai/claude-code" alt="Sigil Scan"></a>Run This Scan Yourself
Scan your own packages
Run Sigil locally to audit any package before it touches your codebase.
Early Access
Get cloud scanning, threat intel, and CI/CD integration.
Join 150+ developers on the waitlist.
Get threat intelligence and product updates
Security research, new threat signatures, and product updates. No spam.
Other npm scans
Believe this result is incorrect? Request a review or see our Terms of Service and Methodology.