VULNERABILITY INTELLIGENCE

CVE-2026-31950

CVSS score5.3 MEDIUM
EPSS probability0.22%
CISA KEVNot currently listed
Published2026-03-27
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-284
  • nvd@nist.gov: CWE-639

Primary references