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npm · Malicious package advisory

Malware

jp_postal_codes

GHSA-99rc-2hm4-crxr

Malicious code in jp_postal_codes (npm)

Details

**Severity:** Critical

**Affected versions:** `> 0`

The package jp_postal_codes was found to contain malicious code.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/ce5aebcf135d19fafa94c24995d7ad8fac9d024d/osv/malicious/npm/jp_postal_codes/MAL-2025-23883.json))

**References:**
- https://github.com/ossf/malicious-packages/blob/ce5aebcf135d19fafa94c24995d7ad8fac9d024d/osv/malicious/npm/jp_postal_codes/MAL-2025-23883.json
- https://github.com/advisories/GHSA-99rc-2hm4-crxr

Compromised versions (1)

  • > 0

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.