CVE-2024-8796: devise-two-factor — Fix

Description

Under the default configuration, Devise-Two-Factor versions >= 2.2.0 & < 6.0.0 generate TOTP shared secrets that are 120 bits instead of the 128-bit minimum defined by RFC 4226. Using a shared secret shorter than the minimum to generate a multi-factor authentication code could make it easier for an attacker to guess the shared secret and generate valid TOTP codes.

Is your site exposed to CVE-2024-8796?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

5.3

MEDIUM

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

Weakness Type (CWE)

CWE-331 CWE-331

Affected Products

Vendor	Product	Versions
tinfoilsecurity	devise-two-factor	4.0.0 — 6.0.0
tinfoilsecurity	devise-two-factor	All

References

Advisories & Patches

https://github.com/devise-two-factor/devise-two-factor/security/advisories/GHSA-qjxf-mc72-wjr2

Frequently Asked Questions

What is CVE-2024-8796? +

Under the default configuration, Devise-Two-Factor versions >= 2.2.0 & < 6.0.0 generate TOTP shared secrets that are 120 bits instead of the 128-bit minimum defined by RFC 4226. Using a shared secret shorter than the minimum to generate a multi-factor authentication code could make it easier for an attacker to guess the shared secret and generate valid TOTP codes. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2024-8796? +

CVE-2024-8796 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-8796? +

CVE-2024-8796 affects products from tinfoilsecurity, specifically: devise-two-factor. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-8796? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-54885

Thinbus Javascript Secure Remote Password is a browser SRP6a implementation for zero-knowledge password authentication. In versions 2.0.0 and below, a …

CVE-2025-50122

A CWE-331: Insufficient Entropy vulnerability exists that could cause root password discovery when the password generation algorithm is reverse engineered …

CVE-2025-15629

A cryptographic weakness exists in the Omada adoption protocol where session encryption keys used to protect communications between controllers and …

CVE-2026-4930

SYMCRYPTO is the SiXG301's host side hardware engine accessed by PSA crypto library that accelerates symmetric cryptographic operations (AES encryption/decryption …

CVE-2026-4827

CWE‑331: Insufficient Entropy vulnerability exists that could lead to unauthorized access when an attacker on the network can exploit weaknesses …

CVE-2026-42155

Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform …

CVE-2024-8796