LiteLLM: the made-up token that opens your tools. CVE-2026-59822, severity 8.8 out of 10, actively exploited, added to the CISA catalogue on 2 September. The proxy. Many teams place LiteLLM between their agents and their model providers. A made-up token. A stranger presents a token made up out of thin air. The check gives way. The check fails and, rather than refuse, the proxy lets it through with an empty identity. Your tools reached. The attacker reaches the tools your agents expose, with no key at all. The right move. Move to 1.84.0 or later. Otherwise, cut inbound access and rotate the proxy's API keys.