CVE-2026-54040

Published: Jun 25, 2026Modified: Jun 29, 2026

7.1

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

Exploitability: 2.8 / Impact: 4.2

Source: NVD

Description

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.

Affected (1)

Products: Librechat: Librechat

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Librechat Librechat	Up to 0.8.3

Related CWEs

Missing Authentication for Critical Function

The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

References (2)

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-h59w-x9h4-m6gv

Source: security-advisories@github.com

ExploitVendor Advisory

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-h59w-x9h4-m6gv

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

ExploitVendor Advisory

Timeline

No history available yet.