CVE-2025-66201
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-11-29

Last updated on: 2025-12-03

Assigner: GitHub, Inc.

Description
LibreChat is a ChatGPT clone with additional features. Prior to version 0.8.1-rc2, LibreChat is vulnerable to Server-side Request Forgery (SSRF), by passing specially crafted OpenAPI specs to its "Actions" feature and making the LLM use those actions. It could be used by an authenticated user with access to this feature to access URLs only accessible to the LibreChat server (such as cloud metadata services, through which impersonation of the server might be possible). This issue has been patched in version 0.8.1-rc2.
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Meta Information
Published
2025-11-29
Last Modified
2025-12-03
Generated
2026-06-16
AI Q&A
2025-11-29
EPSS Evaluated
2026-06-15
NVD
CVE-2025-66201
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
librechat librechat to 0.8.1 (exc)
librechat librechat 0.8.1
librechat librechat 0.8.1
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
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Executive Summary

This vulnerability is a Server-side Request Forgery (SSRF) in LibreChat versions prior to 0.8.1-rc2. An authenticated user with access to the "Actions" feature can pass specially crafted OpenAPI specifications that cause the system to make requests to internal URLs accessible only to the LibreChat server. This could allow the attacker to access sensitive internal resources, such as cloud metadata services, potentially enabling server impersonation.

Impact Analysis

The vulnerability can allow an authenticated user to access internal URLs and services that should be protected from external access. This could lead to unauthorized access to sensitive information, such as cloud metadata, which might be used to impersonate the server or escalate privileges, potentially compromising the security and integrity of the system.

Mitigation Strategies

Upgrade LibreChat to version 0.8.1-rc2 or later, as this version contains the patch that fixes the SSRF vulnerability in the Actions feature.

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