On June 16, 2026, an OSV advisory was published for LiteLLM detailing CVE-2026-49468, an authentication bypass...
On June 16, 2026, an OSV advisory was published for LiteLLM detailing CVE-2026-49468, an authentication bypass vulnerability via Host Header Injection (source). This allows attackers to bypass authentication mechanisms by manipulating the Host header in HTTP requests. Given LiteLLM is widely used to interface with LLM API providers, this vulnerability could compromise API key security and lead to unauthorized access. The advisory has a single source and no patch release noted as of the latest PyPI release (1.91.0.dev1 on June 23). This poses a significant security risk to users, potentially reducing trust and uptake.
signal brief
On June 16, 2026, an OSV advisory was published for LiteLLM detailing CVE-2026-49468, an authentication bypass vulnerability via Host Header Injection (source). This allows attackers to bypass authentication mechanisms by manipulating the Host header in HTTP requests. Given LiteLLM is widely used to interface with LLM API providers, this vulnerability could compromise API key security and lead to unauthorized access. The advisory has a single source and no patch release noted as of the latest PyPI release (1.91.0.dev1 on June 23). This poses a significant security risk to users, potentially reducing trust and uptake.
evidence
Decision support, not stock advice. This signal is research with cited evidence — not a recommendation to buy, sell, or hold any security.