CVE-2026-59819

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. Prior to 1.83.10-stable, LiteLLM's /health/testconnection endpoint resolved request-supplied environment and OIDC file references in litellmparams, allowing a proxy administrator or another privileged caller with...

CVE-2026-59821

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. Prior to 1.82.0-stable, LiteLLM's Custom Code Guardrails production create and update paths did not apply the same sandboxing and validation used by the test endpoint, allowing a privileged user with access to creat...

CVE-2026-59822

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. Prior to 1.84.0, LiteLLM's MCP Streamable HTTP endpoint allowed an unauthenticated attacker to use a fabricated Authorization header to trigger an OAuth2 passthrough fallback path that replaced failed LiteLLM key...

CVE-2026-59819 LiteLLM: Local file read via request-supplied OIDC file references

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. Prior to 1.83.10-stable, LiteLLM's /health/testconnection endpoint resolved request-supplied environment and OIDC file references in litellmparams, allowing a proxy administrator or another privileged caller with...

CVE-2026-59819

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. Prior to 1.83.10-stable, LiteLLM's /health/testconnection endpoint resolved request-supplied environment and OIDC file references in litellmparams, allowing a proxy administrator or another privileged caller with...

CVE-2026-59819 LiteLLM: Local file read via request-supplied OIDC file references

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. Prior to 1.83.10-stable, LiteLLM's /health/testconnection endpoint resolved request-supplied environment and OIDC file references in litellmparams, allowing a proxy administrator or another privileged caller with...

CVE-2026-59822 LiteLLM: MCP Authentication Bypass via OAuth2 Passthrough Fallback

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. Prior to 1.84.0, LiteLLM's MCP Streamable HTTP endpoint allowed an unauthenticated attacker to use a fabricated Authorization header to trigger an OAuth2 passthrough fallback path that replaced failed LiteLLM key...

CVE-2026-59822 LiteLLM: MCP Authentication Bypass via OAuth2 Passthrough Fallback

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. Prior to 1.84.0, LiteLLM's MCP Streamable HTTP endpoint allowed an unauthenticated attacker to use a fabricated Authorization header to trigger an OAuth2 passthrough fallback path that replaced failed LiteLLM key...

CVE-2026-59822

LiteLLM (an AI Gateway/proxy for LLM APIs) is vulnerable to an MCP authentication bypass prior to version 1.84.0 . The MCP Streamable HTTP endpoint's OAuth2 passthrough fallback path replaces a failed LiteLLM key validation with an empty UserAPIKeyAuth() object when a fabricated Authorization hea...

CVE-2026-59822 LiteLLM: MCP Authentication Bypass via OAuth2 Passthrough Fallback

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. Prior to 1.84.0, LiteLLM's MCP Streamable HTTP endpoint allowed an unauthenticated attacker to use a fabricated Authorization header to trigger an OAuth2 passthrough fallback path that replaced failed LiteLLM key...

CVE-2026-59820

LiteLLM is a proxy AI gateway. A path traversal flaw existed in LiteLLM Skills archive extraction prior to version 1.83.7-stable, where uploaded skill ZIPs could write outside the intended extraction directory when an authenticated user accessed LLM API routes or held a key with /v1/skills, anthr...

CVE-2026-59821 LiteLLM: Custom Code Guardrails production endpoints bypass code safety checks

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. Prior to 1.82.0-stable, LiteLLM's Custom Code Guardrails production create and update paths did not apply the same sandboxing and validation used by the test endpoint, allowing a privileged user with access to creat...

CVE-2026-59821 LiteLLM: Custom Code Guardrails production endpoints bypass code safety checks

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. Prior to 1.82.0-stable, LiteLLM's Custom Code Guardrails production create and update paths did not apply the same sandboxing and validation used by the test endpoint, allowing a privileged user with access to creat...

CVE-2026-59821

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. Prior to 1.82.0-stable, LiteLLM's Custom Code Guardrails production create and update paths did not apply the same sandboxing and validation used by the test endpoint, allowing a privileged user with access to creat...

CVE-2026-59821

CVE-2026-59821 affects LiteLLM , an AI Gateway proxy server for LLM APIs. The Custom Code Guardrails production create and update endpoints (POST /guardrails, PUT /guardrails/{guardrail_id}) failed to apply the same sandboxing and validation used by the test endpoint, allowing a privileged user t...

CVE-2026-59822: Improper Authentication

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. Prior to 1.84.0, LiteLLM's MCP Streamable HTTP endpoint allowed an unauthenticated attacker to use a fabricated Authorization header to trigger an OAuth2 passthrough fallback path that replaced failed LiteLLM key...

VulnCheck KEV: CVE-2026-59822

BerriAI LiteLLM contains an improper authentication vulnerability in the MCP Streamable HTTP endpoint that could allow an unauthenticated attacker to establish an authenticated MCP session using an arbitrary Bearer token...

CVE-2026-59821: Improper Control of Generation of Code

LiteLLM is a proxy server AI Gateway to call LLM APIs in OpenAI or native format. Prior to 1.82.0-stable, LiteLLM's Custom Code Guardrails production create and update paths did not apply the same sandboxing and validation used by the test endpoint, allowing a privileged user with access to creat...

PT-2026-56544

Name of the Vulnerable Software and Affected Versions LiteLLM versions prior to 1.82.0-stable Description LiteLLM is a proxy server that acts as an AI Gateway for calling LLM APIs. A flaw exists in the production create and update paths of the Custom Code Guardrails, which failed to apply the sam...

PT-2026-56542

Name of the Vulnerable Software and Affected Versions LiteLLM versions prior to 1.83.10-stable Description LiteLLM is a proxy server that functions as an AI Gateway for calling LLM APIs. The '/health/test connection' endpoint resolves request-supplied environment and OIDC file references within t...