CVE-2026-31950: 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`…

PriorityP431medium5.3CVSS 3.1

AVNACHPRLUINSUCHINAN

EPSS

0.21%

11.0th percentile

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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
danny-avila	librechat	—	—
librechat	librechat	—	—

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