🛡️ CVE-2026-31949
🟡 CVSS 6.5 — Medium ⚠️ Exploit Public CWE-248 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE CWE-248
Public Exploit ⚠️ Yes
Source NVD
Published 2026-03-13
Updated 2026-06-02
Modified 2026-03-17
Fix URL N/A

Affected Packages

Software From version Fixed in
librechat — 0.8.3

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