yamlformatter-utils

GHSA-rccj-4982-7jfw

Malicious code in yamlformatter-utils (PyPI)

Details

**Severity:** Critical

**Affected versions:** `= 1.0.0`

## Source: kam193 (ef2cbf7d7c360d11860ea9383a1ed84b491e75361f994359fd97284a5d25cdc2)
During import, the package collects sensitive information and exfiltrates it using DNS queries.


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Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.


Campaign: 2026-08-ekx-report-utils


Reasons (based on the campaign):


 - targetted-attack


 - exfiltration-generic


 - exfiltration-credentials

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/f686f707b41fdea6c49bfdc86ab0f36b03099405/osv/malicious/pypi/yamlformatter-utils/MAL-2026-14590.json))

**References:**
- https://bad-packages.kam193.eu/pypi/package/yamlformatter-utils
- https://github.com/ossf/malicious-packages/blob/f686f707b41fdea6c49bfdc86ab0f36b03099405/osv/malicious/pypi/yamlformatter-utils/MAL-2026-14590.json
- https://github.com/advisories/GHSA-rccj-4982-7jfw

Compromised versions (1)

= 1.0.0

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