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CVE-2026-12774— BerriAI litellm MCP Server Connection Testing rest_endpoints.py _execute_with_mcp_client server-side request forgery

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.

LiteLLM是LiteLLM团队开源的一个应用程序。 litellm 1.82.2及之前版本存在服务端请求伪造漏洞，该漏洞源于MCP Server Connection Testing组件中文件litellm/proxy/_experimental/mcp_server/rest_endpoints.py的函数_execute_with_mcp_client容易受到服务端请求伪造攻击。

CVSS 6.3 · Medium EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
BerriAI litellm 1.82.0 affected
1.82.1 affected
1.82.2 affected
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I. Basic Information for CVE-2026-12774

Vulnerability Information
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Vulnerability Title
BerriAI litellm MCP Server Connection Testing rest_endpoints.py _execute_with_mcp_client server-side request forgery
Source: CVE Program / CVE List V5
Vulnerability Description
A security vulnerability has been detected in BerriAI litellm up to 1.82.2. Affected by this vulnerability is the function _execute_with_mcp_client of the file litellm/proxy/_experimental/mcp_server/rest_endpoints.py of the component MCP Server Connection Testing. The manipulation leads to server-side request forgery. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
litellm 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LiteLLM是LiteLLM团队开源的一个应用程序。 litellm 1.82.2及之前版本存在服务端请求伪造漏洞，该漏洞源于MCP Server Connection Testing组件中文件litellm/proxy/_experimental/mcp_server/rest_endpoints.py的函数_execute_with_mcp_client容易受到服务端请求伪造攻击。
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 1.82.0 cpe:2.3:a:litellm:litellm:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-12774

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III. Intelligence Information for CVE-2026-12774

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Proof of Concept for CVE-2026-12774 (1)

Same Patch Batch · BerriAI · 2026-06-21 · 10 CVEs total

CVE-2026-12773 7.3 HIGH BerriAI litellm MCP Proxy user_api_key_auth_mcp.py UserAPIKeyAuth improper authentication
CVE-2026-12795 7.3 HIGH BerriAI litellm SSO Debug Flow ui_sso.py json.dumps missing authentication
CVE-2026-12798 6.3 MEDIUM BerriAI litellm MCP OpenAPI Spec Loader openapi_to_mcp_generator.py load_openapi_spec_asyn
CVE-2026-12796 6.3 MEDIUM BerriAI litellm SSO Authentication Flow ui_sso.py get_redirect_response_from_openid sessio
CVE-2026-12772 6.3 MEDIUM BerriAI litellm PROXY_ADMIN database API Key Generator login_utils.py authenticate_user se
CVE-2026-12797 6.3 MEDIUM BerriAI litellm Completions banned_keywords.py async_pre_call_hook authorization
CVE-2026-12770 5.4 MEDIUM BerriAI litellm Admin Key key_management_endpoints.py improper authorization
CVE-2026-12771 5.0 MEDIUM BerriAI litellm M2M JWT user_api_key_auth.py improper authorization
CVE-2026-12799 4.3 MEDIUM BerriAI litellm Incomplete Fix CVE-2025-0628 internal_user_endpoints.py ui_view_users impr

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-12774

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