Incident report · Supply chain
LiteLLM Compromised in Supply Chain Attack Delivering Credential Stealer and Backdoor
The LiteLLM Python package, version 1.107.0, was compromised in a software supply chain attack. This incident delivered a credential stealer and a backdoor through its PyPI wheels and Docker images. The package has since been quarantined on the Python Package Index. Systems using LiteLLM for LLM orchestration were exposed.
- Discovered
- Oct 21 2026
- Failure mode
- Supply chain
- Source
- The Hacker News · Oct 21 2026
- Impact
- Credential stealer and backdoor delivered via compromised LiteLLM package
Summary from the public record. The failure mode’s analysis follows.
The agent was fine. Everything it trusted was not.
How Fencio prevents this
The agent trusted a component it had never verified: a package, an extension, a skill, or a server that looked legitimate. When that component changed or was compromised, the agent carried the payload straight into a trusted environment.
Fencio inventories every tool, server, and skill an agent can reach, pins their versions and declared capabilities, and blocks calls when a component starts doing something its manifest never declared, like reading env files or mailing new recipients.
Runtime policy example · Supply chainLive
- 13:00:00mcp.tool upload_file(.env)Capability not in pinned manifestBlock
- 13:03:17mcp.tool lint(src/)Manifest match · v1.4.2Allow
- 13:06:34pkg.install(unverified-name)Package not in approved registryBlock
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