CVE-2026-31950 — LibreChat's IDOR in SSE Stream Subscription Allows Reading Other Users' Chats

CVE-2026-31950

LibreChat's IDOR in SSE Stream Subscription Allows Reading Other Users' Chats PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
danny-avila / LibreChat	affected >= 0.8.2-rc2, < 0.8.2

CWE

CWE-284

References

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-f6rf-vm44-wh5g

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.