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Vulnerability record · CVE-2022-40482 · published 25 April 2023

CVE-2022-40482: Laravel framework observable discrepancy vulnerability

Laravel · Framework

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.

5.3 CVSS 3.1 Medium EPSS 0.89% · top 42.3% CWE-203 · Observable discrepancy
5.3CVSS 3.1 base score
0.89%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 4 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://ephort.dk/blog/laravel-timing-attack-vulnerability/ ExploitTechnical DescriptionThird Party Advisory
https://github.com/ephort/laravel-user-enumeration-demo ExploitThird Party Advisory
https://github.com/laravel/framework/pull/44069 PatchVendor Advisory
https://github.com/laravel/framework/releases/tag/v9.32.0 Release Notes
https://ephort.dk/blog/laravel-timing-attack-vulnerability/ ExploitTechnical DescriptionThird Party Advisory
https://github.com/ephort/laravel-user-enumeration-demo ExploitThird Party Advisory
https://github.com/laravel/framework/pull/44069 PatchVendor Advisory
https://github.com/laravel/framework/releases/tag/v9.32.0 Release Notes

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-40482), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.