Auth bypass in Danny-Avila Librechat
CVE-2026-54036
LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the GET /api/auth/2fa/enable endpoint can be called by an authenticated user (or attacker with a stolen session) even when 2FA is already fully enabled on the account. This endpoint overwrites the existing TOTP secret, generates new backup codes, and sets twoFactorEnabled to false — all without requiring any TOTP or backup code verification. An attacker with a valid session token can completely take over a victim's 2FA, locking the legitimate user out of their own two-factor authentication. This vulnerability is fixed in 0.8.4-rc1.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (29.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 29.7% 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: 0.004 · change: 0.000
Affected products
- Danny-Avila Librechat — versions < 0.8.4-rc1
- Librechat
Weakness classification (CWE)
References
- github.com/danny-avila/LibreChat/security/advisories/GHSA-45fp-6q26-wfgq (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-54036?
- CVE-2026-54036 is a medium-severity vulnerability in Danny-Avila Librechat, classified under Missing Authentication for Critical Function. CVSS score: 5.3/10. Published 2026-06-25.
- How severe is CVE-2026-54036?
- Medium severity. CVSS v3 base score is 5.3 out of 10.