CVE-2026-31950 in danny-avila LibreChatinfo

Summary

LibreChat is a ChatGPT clone with additional features. In versions 0.8.2-rc2 through 0.8.2-rc3, the SSE streaming endpoint `/api/agents/chat/stream/:streamId` does not verify that the requesting user owns the stream. Any authenticated user who obtains or guesses a valid stream ID can subscribe and read another user's real-time chat content, including messages, AI responses, and tool invocations. Version 0.8.2 patches the issue.

Responsible

GitHub_M

Reservation

03/10/2026

Disclosure

03/27/2026

Entries

VulDB provides additional information and datapoints for this CVE:

ID	Vulnerability	CWE	Exp	Cou	CVE
354028	danny-avila LibreChat SSE Streaming Endpoint stream access control	284	Not defined	Official fix	CVE-2026-31950

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