cache-compat-utilsPyPI
Advisory published Updated
cache-compat-utils is a confirmed malicious PyPI package (MAL-2026-5878) that steals credentials and exfiltrates sensitive data (malicious version 0.1.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in cache-compat-utils (PyPI)
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
Search your lockfiles and build artifacts for cache-compat-utils (version 0.1.0).
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 installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
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.