cewe-npm-cops
This report shows the evidence for cewe-npm-cops@99.9.9, the only known version.
This package appears in our research on the dependency confusion probes at version 99 and above, with how it works, the full package list and what to do if you installed it.
OpenSSF/OSV Malicious Advisory
imported 3mo ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-13438 confirms this npm version as malicious.
Advisory
MAL-2026-13438
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in cewe-npm-cops (npm)
Details
cewe-npm-cops@99.9.9 is a dependency-confusion probe. package.json declares scripts.preinstall = 'node preinstall.js'; preinstall.js reads os.hostname() and issues a dns.lookup against `<hostname>.zfir3qor582xqvyqm0tdc7xpqgw7ky8n.oastify.com`, an author-controlled Burp Collaborator (Interactsh) out-of-band host. Every npm install of this package unconditionally leaks the installer's machine hostname via DNS to a third-party OOB service. The package is otherwise hollow: version is set to 99.9.9 (max-version squat designed to override an internal package of the same name during resolution), main is an empty index.js, and author is the placeholder 'Your_HackerOne_Username'. The self-described 'harmless PoC' framing does not change the behavior: installer host identity is exfiltrated to an attacker-controlled endpoint at install time.
References
Source & flagged code
0 flagged · loading sourceNo flagged code excerpts are attached to this scan.
Findings
1 High
HighOsv Malicious Advisory
Affected versions and remediation
This report applies to cewe-npm-cops@99.9.9.
The versions list below shows the verdict for each recorded version.
- Avoid installing cewe-npm-cops@99.9.9. 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: .
Source advisory published: .
This report uses published external intelligence. The advisory does not provide a separate source-code analysis for each listed version.
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