registry / kepler / 1.0.999

kepler@1.0.999

Generated package

AI Security Review

scanned 10d ago · by lpm-firewall-ai

Installing kepler installs a remote URL dependency declared to have an install script. No malicious local package code is present, but the install-time dependency payload is unavailable for inspection.

Static reason

No blocking static signals were detected.

Trigger

npm install kepler

Impact

Unverified code may execute during dependency installation.

Mechanism

remote install-script dependency carrier

Rationale

The package itself is inert, but it stages an opaque remote dependency with an install hook. This is a concrete supply-chain risk requiring a warning rather than a block.

Evidence

package.jsonnpm-shrinkwrap.jsonindex.jsREADME.md

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 Dangerous Capability with low false-positive risk.

Evidence for block

package.json pins dependency to a non-registry artifact URL.
npm-shrinkwrap.json marks that dependency hasInstallScript: true.
The dependency source is not included, so its install-time behavior cannot be verified.

Evidence against

package.json defines no lifecycle scripts.
index.js only exports static name/version fields.
No local code performs network, filesystem, shell, or credential actions.

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 pins dependency to a non-registry artifact URL.

package.jsonView on unpkg

Source & flagged code

1 flagged · loading source

package.jsonView file

•Published source reference

High

Suspicious Dependency Evidence

package.json pins dependency to a non-registry artifact URL.

package.jsonView on unpkg

Findings

3 High

HighSuspicious Dependency Evidencepackage.json

HighSuspicious Dependency Evidence