CVE-2026-31949: LibreChat Denial of Service (DoS) via Unhandled Exception in DELETE /api/convos
LibreChat is a ChatGPT clone with additional features. Prior to 0.8.3-rc1, a Denial of Service (DoS) vulnerability exists in the DELETE /api/convos endpoint that allows an authenticated attacker to crash the Node.js server process by sending malformed requests. The DELETE /api/convos route handler attempts to destructure req.body.arg without validating that it exists. The server crashes due to an unhandled TypeError that bypasses Express error handling middleware and triggers process.exit(1). This vulnerability is fixed in 0.8.3-rc1.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-31949?
CVE-2026-31949 has a high severity due to its potential to cause a Denial of Service (DoS) in the LibreChat application.
How do I fix CVE-2026-31949?
To fix CVE-2026-31949, upgrade LibreChat to version 0.8.3-rc1 or later.
What is the impact of CVE-2026-31949?
The impact of CVE-2026-31949 is that an authenticated attacker can exploit the DELETE /api/convos endpoint to crash the Node.js server.
In which versions of LibreChat is CVE-2026-31949 present?
CVE-2026-31949 is present in versions of LibreChat prior to 0.8.3-rc1.
Who is affected by CVE-2026-31949?
Users of LibreChat versions prior to 0.8.3-rc1 are affected by CVE-2026-31949.