medium5.3
CVE-2026-31950
LibreChat is a ChatGPT clone with additional features.
Impact
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 products
| Vendor | Product | Affected versions |
|---|---|---|
| Librechat | Librechat | Version 0.8.2 |