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CVE-2026-31950

5.3 medium SSVC exploitation: poc Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 5.3 · librechatNVD modified 2026-10-26 21:10

Affected (CPE criteria) 2

  • cpe:2.3:a:librechat:librechat:0.8.2:rc2:*:*:*:*:*:*
  • cpe:2.3:a:librechat:librechat:0.8.2:rc3:*:*:*:*:*:*

References 1