CVE-2026-31950
EUVD-2026-1676727.03.2026, 20:16
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.Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| librechat | librechat | 0.8.2:rc2 |
| librechat | librechat | 0.8.2:rc3 |
𝑥
= Vulnerable software versions
Common Weakness Enumeration
- CWE-284 - Improper Access ControlThe software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
- CWE-639 - Authorization Bypass Through User-Controlled KeyThe system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.