registry / Malware / csvflow-schema

csvflow-schema

Lightweight CSV column-schema validation helper

This report shows the evidence for csvflow-schema@1.0.0. 1 of 2 known versions is blocked or flagged. See all versions.

AI Security Review

scanned 9d ago · by lpm-firewall-ai

The automatic install beacon contacts a fixed external endpoint without an effective consent guard, and the hook also performs unexpected local collection and a Windows process launch. The recorded identifiers are not shown in the request, so the finding is based on the install-time beacon and associated behavior rather than claiming those details were exfiltrated.

Static reason

One or more suspicious static signals were detected.

Trigger

Installing the package runs its postinstall hook.

Impact

The endpoint can observe the install request and its source network address; the hook also creates a local file and may open Calculator on Windows.

Mechanism

The hook writes user, host, working-directory, process, and package-location details to a temporary file, attempts to launch Calculator on Windows, and makes an HTTPS request to the listed endpoint.

Attack narrative

During installation, the package automatically runs a hook that records host and user details in a temporary file, attempts to open Calculator on Windows, and contacts a fixed external endpoint. The source does not show the recorded details being transmitted, but the automatic endpoint contact exposes the installer's network address and execution to that endpoint.

AI rationale

Evidence

package.jsonpostinstall.jsos.tmpdir()/csvflow_schema/pi_2c75177b.ok

Network endpoints1

cdn-status.mulderitsme.net/pi/2c75177b

Decision evidence

public snapshot

AI called this Malicious at 95.0% confidence as Malware with low false-positive risk.

Evidence for block

The package manifest runs `postinstall.js` automatically during installation.
The install hook collects identifying details about the user, host, working directory, parent process, and package location, then writes them to a temporary file.
The install hook makes a request to a fixed external endpoint and also attempts to launch Calculator on Windows.

Evidence against

The collected host and user details are written locally; the source does not show them being included in the network request.
The main entrypoint only exports a CSV schema validation helper.

Behavioral surface

Source

ChildProcessEnvironmentVarsFilesystemNetwork

Supply chain

UrlStrings

ManifestNo manifest risk signals triggered.

scanned 2 file(s), 1.13 KB of source, external domains: cdn-status.mulderitsme.net

Source & flagged code

6 flagged

package.jsonView file

•scripts.postinstall = node ./postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node ./postinstall.js

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

postinstall.jsView file

1// postinstall: prepare local integration cache L2: const fs = require('fs'), os = require('os'), path = require('path'), cp = require('child_process'); L3: try {

High

Child Process

Package source references child process execution.

postinstall.jsView on unpkg · L1

Findings

5 High4 Medium3 Low

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processpostinstall.js

HighSame File Env Network Executionpostinstall.js

HighSandbox Evasion Gated Capabilitypostinstall.js

HighInstall Named Payload Filepostinstall.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowScripts Present

LowFilesystem

LowUrl Strings

Affected versions and remediation

This report applies to csvflow-schema@1.0.0.

The versions list below shows the verdict for each recorded version.

Avoid installing csvflow-schema@1.0.0. 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.

Evidence last updated: 2026-10-29 13:30:04.725Z (UTC).

Source advisory published: 2026-10-26 18:22:11.000Z (UTC).

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

Versions

2 known versions

1.0.0latestshownMaliciousMalwareBlockPublishedOct 26, 2026, 6:21 PM 0.0.0-stageUnknown—AllowUnder ReviewOct 26, 2026, 6:20 PM

registry / Malware / csvflow-schema

csvflow-schema

Lightweight CSV column-schema validation helper

This report shows the evidence for csvflow-schema@1.0.0. 1 of 2 known versions is blocked or flagged. See all versions.

AI Security Review

scanned 9d ago · by lpm-firewall-ai

Static reason

One or more suspicious static signals were detected.

Trigger

Installing the package runs its postinstall hook.

Impact

The endpoint can observe the install request and its source network address; the hook also creates a local file and may open Calculator on Windows.

Mechanism

The hook writes user, host, working-directory, process, and package-location details to a temporary file, attempts to launch Calculator on Windows, and makes an HTTPS request to the listed endpoint.

Attack narrative

AI rationale

Evidence

package.jsonpostinstall.jsos.tmpdir()/csvflow_schema/pi_2c75177b.ok

Network endpoints1

cdn-status.mulderitsme.net/pi/2c75177b

Decision evidence

public snapshot

AI called this Malicious at 95.0% confidence as Malware with low false-positive risk.

Evidence for block

The package manifest runs `postinstall.js` automatically during installation.
The install hook collects identifying details about the user, host, working directory, parent process, and package location, then writes them to a temporary file.
The install hook makes a request to a fixed external endpoint and also attempts to launch Calculator on Windows.

Evidence against

The collected host and user details are written locally; the source does not show them being included in the network request.
The main entrypoint only exports a CSV schema validation helper.

Behavioral surface

Source

ChildProcessEnvironmentVarsFilesystemNetwork

Supply chain

UrlStrings

ManifestNo manifest risk signals triggered.

scanned 2 file(s), 1.13 KB of source, external domains: cdn-status.mulderitsme.net

Source & flagged code

6 flagged

package.jsonView file

•scripts.postinstall = node ./postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node ./postinstall.js

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

postinstall.jsView file

1// postinstall: prepare local integration cache L2: const fs = require('fs'), os = require('os'), path = require('path'), cp = require('child_process'); L3: try {

High

Child Process

Package source references child process execution.

postinstall.jsView on unpkg · L1

Findings

5 High4 Medium3 Low

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processpostinstall.js

HighSame File Env Network Executionpostinstall.js

HighSandbox Evasion Gated Capabilitypostinstall.js

HighInstall Named Payload Filepostinstall.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowScripts Present

LowFilesystem

LowUrl Strings

Affected versions and remediation

This report applies to csvflow-schema@1.0.0.

The versions list below shows the verdict for each recorded version.

Avoid installing csvflow-schema@1.0.0. 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.

Evidence last updated: 2026-10-29 13:30:04.725Z (UTC).

Source advisory published: 2026-10-26 18:22:11.000Z (UTC).

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

Versions

2 known versions

1.0.0latestshownMaliciousMalwareBlockPublishedOct 26, 2026, 6:21 PM 0.0.0-stageUnknown—AllowUnder ReviewOct 26, 2026, 6:20 PM

AI Security Review

Decision evidence

Source & flagged code

Findings

Affected versions and remediation

Versions

AI Security Review

Decision evidence

Source & flagged code

Findings

Affected versions and remediation

Versions

Related packages

Other malware packages

Behavioral surface

Related packages

Other malware packages