cvedb.io
CVE-2026-31945
HIGH · CVSS 7.7
EPSS exploitation probability: 0%
Published 2026-03-27T20:16:30.060 · Last modified 2026-06-17T10:34:49.260

Summary

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.

Affected products

librechat — librechat

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.