🛡️ CVE-2026-31945
🟠 CVSS 7.7 — High ⚠️ Exploit Public CWE-918 NVD
7.7
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

LibreChat is a ChatGPT clone with additional features. Versions 0.8.2-rc2 through 0.8.2 are vulnerable to a server-side request forgery (SSRF) attack when using agent actions or MCP. Although a previous SSRF vulnerability (https://github.com/danny-avila/LibreChat/security/advisories/GHSA-rgjq-4q58-m3q8) was reported and patched, the fix only introduced hostname validation. It does not verify whether DNS resolution results in a private IP address. As a result, an attacker can still bypass the protection and gain access to internal resources, such as an internal RAG API or cloud instance metadata endpoints. Version 0.8.3-rc1 contains a patch.

Details

Severity HIGH
CVSS Score 7.7
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CWE CWE-918
Public Exploit ⚠️ Yes
Source NVD
Published 2026-03-27
Updated 2026-06-02
Modified 2026-03-30
Fix URL N/A

Affected Packages

Software From version Fixed in
librechat — —

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