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CVE-2026-54040
5.9 MEDIUM
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): High (H)
- Privileges Required (PR): Low (L)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): Low (L)
- Integrity (I): High (H)
- Availability (A): None (N)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): High (H)
- Modified Privileges Required (MPR): Low (L)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): Low (L)
- Modified Scope (MS): Unchanged (U)
- Modified Integrity (MI): High (H)
- Modified Availability (MA): None (N)
Activity log
- Created suggestion
LibreChat: 2FA Backup Code Regeneration Without OTP Verification Allows 2FA Bypass
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.
References
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https://github.com/danny-avila/LibreChat/security/advisories/GHSA-h59w-x9h4-m6gv x_refsource_CONFIRMexploit
Affected products
LibreChat
- ==< 0.8.4-rc1
Package maintainers
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@gepbird Gutyina Gergő <gutyina.gergo.2@gmail.com>
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@niklaskorz Niklas Korz <nixpkgs@korz.dev>