registry / kepler / 99.99.99

kepler@99.99.99

Generated package

AI Security Review

scanned 10d ago · by lpm-firewall-ai

Installing kepler fetches a remote direct dependency whose shrinkwrap metadata declares an install script. The package itself contains no executable attack logic.

Static reason

No blocking static signals were detected.

Trigger

npm installation

Impact

Unverified install-time code may run from the remote dependency.

Mechanism

remote dependency with declared install hook

Rationale

kepler contains no direct malicious code, but it deliberately pins an opaque remote dependency that is declared to execute during installation. This is a concrete unresolved install-time payload risk.

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 87.0% confidence as Dangerous Capability with low false-positive risk.

Evidence for block

package.json declares a direct dependency from artifacts.yosiroute.com.
npm-shrinkwrap.json marks that remote dependency hasInstallScript: true.
The installed dependency source is absent, so its install behavior cannot be verified.

Evidence against

package.json has no package lifecycle scripts.
index.js only exports static name/version data.
No package-owned file/network/child-process behavior was found.

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 a direct 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 a direct dependency from artifacts.yosiroute.com.

package.jsonView on unpkg

Findings

3 High

HighSuspicious Dependency Evidencepackage.json

HighSuspicious Dependency Evidence