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CVE-2026-84377— LiteLLM: Authenticated SSRF and provider-credential exfiltration via unvalidated request-body routing parameters

Quick assessment

Affected
BerriAI litellm
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

BerriAI LiteLLM是BerriAI组织的一款统一大语言模型接口的代理服务。 BerriAI LiteLLM 1.88.6之前版本和1.89.0版本至1.96.2之前版本存在服务端请求伪造漏洞，该漏洞源于请求验证不完整，可能允许已认证的代理用户将出站提供商调用重定向至用户控制的地址，导致代理将配置的提供商凭据发送给该地址，从而泄露上游凭据及其他配置秘密，并允许服务器端请求访问代理可达的内部服务。

CVSS 6.5 · Medium EPSS 0.54% · P44

Affected Version Matrix 2

VendorProduct Version RangeStatus
BerriAI litellm < 1.88.6 affected
>= 1.89.0, < 1.96.2 affected
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I. Basic Information for CVE-2026-84377

Vulnerability Information
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Vulnerability Title
LiteLLM: Authenticated SSRF and provider-credential exfiltration via unvalidated request-body routing parameters
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
BerriAI LiteLLM 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BerriAI LiteLLM是BerriAI组织的一款统一大语言模型接口的代理服务。 BerriAI LiteLLM 1.88.6之前版本和1.89.0版本至1.96.2之前版本存在服务端请求伪造漏洞，该漏洞源于请求验证不完整，可能允许已认证的代理用户将出站提供商调用重定向至用户控制的地址，导致代理将配置的提供商凭据发送给该地址，从而泄露上游凭据及其他配置秘密，并允许服务器端请求访问代理可达的内部服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
BerriAI litellm < 1.88.6 -

II. Public POCs for CVE-2026-84377

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III. Intelligence Information for CVE-2026-84377

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Patches & Fixes for CVE-2026-84377 (6)

Vendor Advisories for CVE-2026-84377 (1)

Vendor Pages for CVE-2026-84377 (2)

IV. Related Vulnerabilities

Same product: litellm
Same vendor: BerriAI
Same weakness: CWE-918

V. Comments for CVE-2026-84377

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