Vulnerability in Danny-Avila Librechat
CVE-2026-31949
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (37.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Danny-Avila Librechat — versions < 0.8.3-rc1
- Librechat
Weakness classification (CWE)
References
- github.com/danny-avila/LibreChat/security/advisories/GHSA-5m32-chq6-232p (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-31949?
- CVE-2026-31949 is a medium-severity vulnerability in Danny-Avila Librechat, classified under CWE-248. CVSS score: 6.5/10. Published 2026-03-13.
- How severe is CVE-2026-31949?
- Medium severity. CVSS v3 base score is 6.5 out of 10.