What is CVE-2026-54040?

CVE-2026-54040 is a medium-severity vulnerability in Danny-avila Librechat, classified under Missing Authentication for Critical Function. CVSS score: 5.9/10. Published 2026-06-25.

How severe is CVE-2026-54040?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Auth bypass in Danny-avila Librechat

CVE-2026-54040

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the POST /api/auth/2fa/backup/regenerate endpoint regenerates all 2FA backup codes without requiring any TOTP token or existing backup code ver…

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N.

Affected products

Danny-avila Librechat — versions < 0.8.4-rc1

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-54040?: CVE-2026-54040 is a medium-severity vulnerability in Danny-avila Librechat, classified under Missing Authentication for Critical Function. CVSS score: 5.9/10. Published 2026-06-25.
How severe is CVE-2026-54040?: Medium severity. CVSS v3 base score is 5.9 out of 10.