CVE-2026-84377
Published:September 02, 2026
Updated:October 09, 2026
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to versions 1.88.6 and 1.96.2, any authenticated LiteLLM proxy user could redirect an outbound provider call to a destination the user controls and cause the proxy to send its configured provider credentials to that destination. Request validation in litellm/proxy/auth/auth_utils.py, litellm/proxy/common_request_processing.py, litellm/proxy/health_endpoints/_health_endpoints.py, litellm/proxy/image_endpoints/endpoints.py, and litellm/proxy/litellm_pre_call_utils.py used incomplete checks that did not cover every sensitive parameter or inspect equivalent values across nested request fields, path values, and bracket-notation form data. Routing and credential parameters including api_base, base_url, model_list, fallbacks, and litellm_credential_name could therefore be applied without clearing the operator's stored key, exposing upstream provider credentials and other configured secrets and permitting server-side requests to internal services reachable by the proxy. This issue is fixed in versions 1.88.6 and 1.96.2.
Affected Packages
litellm (CONDA):
Affected version(s) >=1.89.0 <1.96.2Fix Suggestion:
Update to version 1.96.2litellm (CONDA):
Affected version(s) >=1.34.0 <1.88.6Fix Suggestion:
Update to version 1.88.6litellm (CONDA):
Affected version(s) =1.96.0 <1.96.2Fix Suggestion:
Update to version 1.96.2https://github.com/BerriAI/litellm.git (GITHUB):
Affected version(s) >=v1.89.0 <v1.96.2Fix Suggestion:
Update to version v1.96.2litellm (PYTHON):
Affected version(s) >=1.91.0 <1.91.5Fix Suggestion:
Update to version 1.91.5litellm (PYTHON):
Affected version(s) >=0.1.0 <1.88.6Fix Suggestion:
Update to version 1.88.6litellm (PYTHON):
Affected version(s) >=1.90.0 <1.90.7Fix Suggestion:
Update to version 1.90.7litellm (PYTHON):
Affected version(s) >=1.96.0 <1.96.2Fix Suggestion:
Update to version 1.96.2litellm (PYTHON):
Affected version(s) >=1.95.0 <1.95.1Fix Suggestion:
Update to version 1.95.1litellm (PYTHON):
Affected version(s) >=1.89.0 <1.96.2Fix Suggestion:
Update to version 1.96.2litellm (PYTHON):
Affected version(s) >=1.89.0 <1.89.7Fix Suggestion:
Update to version 1.89.7litellm (PYTHON):
Affected version(s) >=1.92.0 <1.92.2Fix Suggestion:
Update to version 1.92.2litellm (PYTHON):
Affected version(s) >=1.94.0 <1.94.3Fix Suggestion:
Update to version 1.94.3litellm (PYTHON):
Affected version(s) >=1.93.0 <1.93.2Fix Suggestion:
Update to version 1.93.2Related Resources (14)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Server-Side Request Forgery (SSRF)
EPSS
Base Score:
0.54