LiteLLM 1.107.0 compromise: incident response guide
What happened The LiteLLM 1.107.0 compromise began on October 21, 2026, when a compromised litellm==1.107.0 was published to PyPI and to LiteLLM's container registries. LiteLLM's incident post states that earlier versions are safe, that the affected releases were pulled, and that customers on the private enterprise release were not affected. Its attack-chain post says the artifacts were live for…
On October 21, 2026, a compromised version of LiteLLM 1.107.0 was published to the Python Package Index (PyPI) and LiteLLM's container registries. The affected releases were pulled, and customers on the private enterprise release were not impacted. The attack chain lasted for approximately two hours, during which time the malicious package could potentially access sensitive information such as model-provider API keys, database connection strings, and workload identities.
LiteLLM is commonly used as a gateway between applications and model providers, making it a high-risk target for attackers. The malicious package contained files that were executed during interpreter initialization, allowing the attacker to collect credentials and other sensitive data without the application needing to import LiteLLM.
To respond to this incident, it is crucial to identify and isolate all copies of the affected package, rebuild environments and images from verified artifacts, rotate secrets, and implement additional security measures such as hash-pinned lock files, image digests, and egress control.
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