registry / kepler / 2.2.999

kepler@2.2.999

Generated package

AI Security Review

scanned 10d ago · by lpm-firewall-ai

Installing this package resolves a direct-URL dependency whose shrinkwrap metadata declares an install script. The dependency payload is not included, so no concrete payload behavior is source-confirmed.

Static reason

No blocking static signals were detected.

Trigger

npm installation of kepler

Impact

A remotely supplied dependency install script may execute during installation.

Mechanism

external lifecycle-bearing dependency acquisition

Rationale

The package contains no confirmed malicious code, but it intentionally delegates installation-time execution to an opaque direct-URL dependency. This is a material staged-payload risk requiring a warning.

Evidence

package.jsonnpm-shrinkwrap.jsonindex.js

Network endpoints1

artifacts.yosiroute.com/npm/flag-serial-object-syntax

OSV Corroboration

OpenSSF/OSV

Advisory

MAL-2026-13369

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in kepler (npm)

Details

kepler@2.0.999 declares its only runtime dependency, flag-serial-object-syntax, as an HTTP URL to a third-party host (https://artifacts.yosiroute.com/npm/flag-serial-object-syntax) rather than a version resolved from the npm registry, and the shrinkwrap marks that dependency with hasInstallScript: true. Running `npm install kepler` fetches an unpinned, unverified tarball from artifacts.yosiroute.com and executes its lifecycle scripts on the installer's machine. The URL carries no version and no integrity metadata, so its contents can change at any time under the third-party host's control. The kepler package itself has placeholder metadata (author `Package Registry`, repository `github.com/example/...`) unrelated to the yosiroute.com host, and ships no first-party code that would justify sourcing a dependency off-registry. The dependency-tree-hijack shape — an off-registry, mutable, install-scripted tarball pulled in transitively — means any code the operator of artifacts.yosiroute.com serves runs with the privileges of the installer on `npm install`.

References

OSV advisory PACKAGE PACKAGE PACKAGE PACKAGE PACKAGE PACKAGE

Decision evidence

public snapshot

AI called this Suspicious at 88.0% confidence as Unknown with medium false-positive risk.

Evidence for block

package.json declares dependency from artifacts.yosiroute.com
npm-shrinkwrap.json marks that dependency hasInstallScript
Dependency source is a direct external URL rather than a registry version
Manifest and shrinkwrap package versions conflict (2.2.999 vs 1.0.0)

Evidence against

index.js only exports static name/version data
package.json has no lifecycle scripts
No package source reads files, invokes commands, or makes network requests

Behavioral surface

SourceNo risky source behavior triggered.

Supply chain

Trivial

ManifestNo manifest risk signals triggered.

scanned 1 file(s), 62 B of source

Source & flagged code

1 flagged

package.jsonView file

•Published source reference

High

Suspicious Dependency Evidence

package.json declares dependency from artifacts.yosiroute.com

package.jsonView on unpkg

Source & flagged code

1 flagged · loading source

package.jsonView file

•Published source reference

High

Suspicious Dependency Evidence

package.json declares dependency from artifacts.yosiroute.com

package.jsonView on unpkg

Findings

4 High

HighSuspicious Dependency Evidencepackage.json

HighSuspicious Dependency Evidence

HighAi Review Evidence