postman-cli@1.73.0

Official Postman CLI - Command-line companion for API development, testing, and automation

AI Security Review

scanned 12d ago · by lpm-firewall-ai

The package performs guarded, first-party agent instruction setup during global installation. This presents an agent configuration lifecycle risk, but the inspected source does not establish malicious behavior or an unconsented broad control-surface attack.

Static reason

High-risk behavior combination matched malicious policy.

Trigger

Installing postman-cli globally with npm when a supported agent configuration directory exists.

Impact

The change influences instructions loaded by a supported AI agent; the inspected code does not establish broader configuration changes, credential access, or network activity.

Mechanism

The hook checks the global-install setting, detects the agent configuration directory, and appends a marked Postman instruction block to its instruction file without a separate user prompt.

AI rationale

Evidence

package.jsonscripts/post-npm-installation.jsCLAUDE.mdAGENTS.override.mdAGENTS.md

Decision evidence

public snapshot

AI called this Suspicious at 89.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

The package runs scripts/post-npm-installation.js from its postinstall hook.
The hook runs agent configuration only for global npm installs and targets Claude Code and Codex instruction files.
The installer appends a Postman availability instruction to detected agent configuration files without a separate consent check.
The added instruction is limited to advertising Postman CLI availability; no credential collection or network transmission is established.

Evidence against

The installer is limited to a global-install trigger and existing agent configuration directories.
The inspected code shows a short product-availability instruction, not remote code execution or secret handling.

Behavioral surface

Source

ChildProcessEnvironmentVarsFilesystem

Supply chainNo supply-chain packaging signals triggered.

Manifest

NoLicense

scanned 3 file(s), 15.0 KB of source

Source & flagged code

7 flagged

package.jsonView file

Lines 32-72json

32 "gitlab-ci",

33 "azure-devops",

34 "jenkins",

35 "circleci",

36 "integration-testing",

37 "functional-testing",

38 "test-reports",

39 "junit-reports",

40 "html-reports",

41 "postman-automation",

42 "postman-testing",

43 "postman-runner",

44 "postman-monitor",

45 "rest-api",

46 "http-testing",

47 "api-tools"

48 ],

49 "bin": {

50 "postman": "bin/postman.js"

51 },

52 "scripts": {

53 "postinstall": "node ./scripts/post-npm-installation.js"

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L53

54 },

55 "man": "./man/postman.1",

Medium

Suspicious Lifecycle Evidence

The package runs scripts/post-npm-installation.js from its postinstall hook.

package.jsonView on unpkg · L52

56 "files": [

57 "bin/",

58 "index.js",

59 "package.json",

60 "README.md",

61 "man/",

62 "scripts/"

63 ],

64 "optionalDependencies": {

65 "@postman/pm-bin-macos-arm64": "1.73.0",

66 "@postman/pm-bin-macos-x64": "1.73.0",

67 "@postman/pm-bin-linux-x64": "1.73.0",

68 "@postman/pm-bin-linux-arm64": "1.73.0",

69 "@postman/pm-bin-windows-x64": "1.73.0"

70 }

71}

scripts/post-npm-installation.jsView file

Lines 47-88javascript

47 */

48function resolveInstructionFile (agentConfiguration, configurationRoot) {

49 const existingInstructionFileName = agentConfiguration.instructionFileNames.find(

50 (instructionFileName) =>

scripts/post-npm-installation.js#virtual:normalized:round1View file

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

High

Semantic Analysis Limited

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

scripts/post-npm-installation.js#virtual:normalized:round1View on unpkg

Source & flagged code

7 flagged · loading source

package.jsonView file

•scripts.postinstall = node ./scripts/post-npm[redacted]

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

52"scripts": { "postinstall": "node ./scripts/post-npm[redacted]" }, "man": "./ma

Medium

Suspicious Lifecycle Evidence

The package runs scripts/post-npm-installation.js from its postinstall hook.

package.jsonView on unpkg · L52

scripts/post-npm-installation.jsView file

67[redacted]: 'CLAUDE_CONFIG_DIR', L68: fallbackDirectory: '.claude', L69: instructionFileNames: ['CLAUDE.md'], L70: postConfiguration: ({ configurationResult, invocationDirectory }) => { L71: const projectConfigurationDetected = invocationDirectory ? L72: isDirectory(path.join(invocationDirectory, '.claude')) : L73: false; ... L82: [redacted]: 'CODEX_HOME', L83: fallbackDirectory: '.codex', L84: instructionFileNames: ['AGENTS.override.md', 'AGENTS.md'] L85: } ... L199:

Findings

1 Critical2 High6 Medium3 Low

CriticalAi Agent Control Hijackscripts/post-npm-installation.js

HighInstall Time Lifecycle Scriptspackage.json

HighSemantic Analysis Limitedscripts/post-npm-installation.js#virtual:normalized:round1

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

MediumSuspicious Lifecycle Evidencepackage.json

MediumAi Review Evidencescripts/post-npm-installation.js

LowScripts Present

LowFilesystem

LowNo License

Affected versions and remediation

This report applies to postman-cli@1.73.0.

See all versions of postman-cli for other recorded verdicts.

Review the evidence and your use of postman-cli@1.73.0 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: 2026-10-11 13:03:58.562Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.