registry / resend-cli / 2.19.0
resend-cli@2.19.0
The official CLI for Resend
AI Security Review
scanned 2mo ago · by lpm-firewall-aiThe high-risk scanner matches are explained by an email-service CLI, optional telemetry, credential storage, and explicitly invoked API operations. Source inspection found no install hook or concrete exfiltration of credentials or command output.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Running a Resend CLI command.
Impact
Command names and basic runtime metadata may be disclosed to the telemetry service; no Resend API key is included in the telemetry payload.
Mechanism
Anonymous command telemetry sent to PostHog.
AI rationale
The high-risk scanner matches are explained by an email-service CLI, optional telemetry, credential storage, and explicitly invoked API operations. Source inspection found no install hook or concrete exfiltration of credentials or command output.
Network endpoints2
us.i.posthog.com/capture/api.resend.com
Decision evidence
public snapshotAI called this Clean at 92.0% confidence as Benign with low false-positive risk.
Evidence for AI clean decision
- The command-line program records anonymous usage telemetry unless the documented opt-out environment variable is set.
- The package exposes a CLI binary and has no install lifecycle hook.
Evidence against
- Telemetry contains command, version, operating-system, Node version, interaction mode, installation method, and flag names; it does not include the Resend credential.
- The only confirmed telemetry receiver is PostHog; API traffic is directed to the Resend API.
- Child-process use launches the CLI's own telemetry flush command or opens a user-requested browser.
- No credential harvesting, arbitrary command-output upload, install-time execution, or foreign configuration mutation was found.
Behavioral surface
ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetwork
HighEntropyStringsMinifiedTelemetryUrlStrings
Source & flagged code
10 flaggeddist/cli.cjsView file
1Source sends the broad process environment to a literal external destination.
L1: #!/usr/bin/env node
L2: "use strict";var Iu=Object.create;var xi=Object.defineProperty;var ju=Object.getOwnPropertyDescriptor;var Pu=Object.getOwnPropertyNames;var $u=Object.getPrototypeOf,Gu=Object.proto...
L3: `)}displayWidth(t){return Lr(t).length}styleTitle(t){return t}styleUsage(t){return t.split(" ").map(o=>o==="[options]"?this.styleOptionText(o):o==="[command]"?this.styleSubcommandT...
...
L13: (Did you mean one of ${i.join(", ")}?)`:i.length===1?`
L14: (Did you mean ${i[0]}?)`:""}Jr.suggestSimilar=Ju});var Zr=Fe(Qi=>{var Vu=require("node:events").EventEmitter,Pi=require("node:child_process"),et=require("node:path"),Ko=require("no...
L15: - specify the name in Command constructor or using .name()`);ret
Critical
Hardcoded Runtime Data Exfiltration
Source sends credentials or rich application records to a package-controlled external receiver enabled by default.
dist/cli.cjsView on unpkg · L113(Did you mean one of ${i.join(", ")}?)`:i.length===1?`
L14: (Did you mean ${i[0]}?)`:""}Jr.suggestSimilar=Ju});var Zr=Fe(Qi=>{var Vu=require("node:events").EventEmitter,Pi=require("node:child_process"),et=require("node:path"),Ko=require("no...
L15: - specify the name in Command constructor or using .name()`);return o=o||{},o.isDefault&&(this._defaultCommandName=t._name),(o.noHelp||o.hidden)&&(t._hidden=!0),this._registerComma...
...
L26: Expecting one of '${i.join("', '")}'`);let r=`${t}Help`;return this.on(r,n=>{let s;typeof o=="function"?s=o({error:n.error,command:n.command}):s=o,s&&n.write(`${s}
L27: `)}),this}_outputHelpIfRequested(t){let o=this._getHelpOption();o&&t.find(r=>o.is(r))&&(this.outputHelp(),this._exit(0,"commander.helpDisplayed","(outputHelp)"))}};function Xr(e){r...
Findings
3 Critical5 High5 Medium5 Low
CriticalHardcoded Runtime Data Exfiltrationdist/cli.cjs
CriticalCommand Output Exfiltrationdist/cli.cjs
CriticalTrigger Reachable Dangerous Capabilitydist/cli.cjs
HighChild Processdist/cli.cjs
HighSame File Env Network Executiondist/cli.cjs
HighSandbox Evasion Gated Capabilitydist/cli.cjs
HighTrigger Reachable Command Output Exfiltrationdist/cli.cjs
HighTrigger Reachable Persistencedist/cli.cjs
MediumDynamic Requiredist/cli.cjs
MediumNetwork
MediumEnvironment Vars
MediumInstall Persistencedist/cli.cjs
Medium
Affected versions and remediation
This report applies to resend-cli@2.19.0.
See all versions of resend-cli for other recorded verdicts.
- Review the evidence and your use of resend-cli@2.19.0 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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.