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npm · Malicious package advisory

Malware

cf-middleware-set-header

GHSA-5fc4-jv3w-r2xg

Malicious code in cf-middleware-set-header (npm)

Details

**Severity:** Critical

**Affected versions:** `= 99.99.99`

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/4012598c9b06e58935bd8883f7a0cd37c3130664/osv/malicious/npm/cf-middleware-set-header/MAL-2025-2865.json))

**References:**
- https://github.com/ossf/malicious-packages/blob/4012598c9b06e58935bd8883f7a0cd37c3130664/osv/malicious/npm/cf-middleware-set-header/MAL-2025-2865.json
- https://github.com/advisories/GHSA-5fc4-jv3w-r2xg

Compromised versions (1)

  • = 99.99.99

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