CVE-2026-54040

MEDIUM

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 verification. An attacker with a stolen session token can silently replace a victim's backup codes and use them to bypass 2FA login or disable 2FA entirely. This vulnerability is fixed in 0.8.4-rc1.

CVSS v3.1 Score

5.9
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
HIGH
Availability
NONE
Published: 6/25/2026Modified: 6/29/2026

Related Intelligence (1)

HIGHVulnerability

NVD HIGH: CVE-2026-54040 — LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prio...

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 verification. An attacker with a stolen session token can silently replace a victim's backup codes and use them to bypass 2FA login or disable 2FA entirely. This vu

CVE-2026-54040
NIST NVD

References (2)

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-h59w-x9h4-m6gvExploitVendor Advisoryhttps://github.com/danny-avila/LibreChat/security/advisories/GHSA-h59w-x9h4-m6gvExploitVendor Advisory