CVE-2026-31950: LibreChat is a ChatGPT clone with additional features. In versions 0.8.2-rc2 through 0.8.2-rc3, the SSE streaming…
CVE-2026-31950 · Severity: medium · CVSS 5.3 · Published 2026-03-27
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-31950 being exploited in the wild.
How severe is CVE-2026-31950?
Medium severity, with a CVSS score of 5.3, published 27 March 2026.
Which products and versions are affected?
LibreChat. The advisory does not name versions.
Is there a fix for CVE-2026-31950?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-31950?
Check whether you run LibreChat. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.