cache-compat-utilsPyPI
Malicious code in cache-compat-utils (PyPI) Remove it immediately and rotate any exposed credentials.
What this malware does
The package was found to contain malicious code or consuming dependency that contains malicious code
The package contains obfuscated JS code with an infostealer harvesting all kinds of credentials, as well as a worm capable of spreading the infection further.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-06-cache-compat-utils
Reasons (based on the campaign):
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obfuscation
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malware
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infostealer
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exfiltration-credentials
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exfiltration-ssh-keys
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exfiltration-cloud-tokens
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for cache-compat-utils (version 0.1.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging cache-compat-utils across your stack and pipelines.
If you installed it — respond
cache-compat-utils is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If cache-compat-utils was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks cache-compat-utils before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
- Kamil Mańkowski (kam193) · analyst
Detect & block this
O3 blocks cache-compat-utils-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.