CVE-2026-31950 (GCVE-0-2026-31950)
Vulnerability from cvelistv5 – Published: 2026-03-27 19:25 – Updated: 2026-03-27 19:55
VLAI
EPSS
VEX
Title
LibreChat's IDOR in SSE Stream Subscription Allows Reading Other Users' Chats
Summary
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.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-27 19:55 UTC
CWE
- CWE-284 - Improper Access Control
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/danny-avila/LibreChat/security… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| danny-avila | LibreChat |
Affected:
>= 0.8.2-rc2, < 0.8.2
|
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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