What’s Vulnerable › Vulnerabilities

CVE-2022-40482

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-04-25 · updated 2026-06-17
• Weakness: CWE-203

Description

The authentication method in Laravel 8.x through 9.x before 9.32.0 was discovered to be vulnerable to user enumeration via timeless timing attacks with HTTP/2 multiplexing. This is caused by the early return inside the hasValidCredentials method in the Illuminate\Auth\SessionGuard class when a user is found to not exist.

Affected products

• Laravel Framework: from 8.0.0 before 8.83.24; from 9.0.0 before 9.32.0 — fixed in 8.83.24, 9.32.0

How to fix

Upgrade to a fixed version: Laravel Framework 8.83.24, 9.32.0. Check the vendor advisory for mitigations.

References

• https://ephort.dk/blog/laravel-timing-attack-vulnerability/
• https://github.com/ephort/laravel-user-enumeration-demo
• https://github.com/laravel/framework/pull/44069
• https://github.com/laravel/framework/releases/tag/v9.32.0
• https://ephort.dk/blog/laravel-timing-attack-vulnerability/
• https://github.com/ephort/laravel-user-enumeration-demo
• https://github.com/laravel/framework/pull/44069
• https://github.com/laravel/framework/releases/tag/v9.32.0

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