GHSA-7852-W36X-6MF6

Laravel Encrypter Component Potential Decryption Failure Leading to Unintended Behavior

The Laravel Encrypter component is susceptible to a vulnerability that may result in decryption failure, leading to an unexpected return of false. Exploiting this issue requires the attacker to manipulate the encrypted payload before decryption. When combined with weak type comparisons in the application's code, such as the example below:

<?php

$decyptedValue = decrypt($secret);

if ($decryptedValue == '') {
    // Code is run even though decrypted value is false...
}

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1. What is GHSA-7852-W36X-6MF6? GHSA-7852-W36X-6MF6 is a medium-severity security vulnerability in laravel/framework (composer), affecting versions < 5.5.40. It is fixed in 5.5.40, 5.6.15.
2. Which versions of laravel/framework are affected by GHSA-7852-W36X-6MF6? laravel/framework (composer) versions < 5.5.40 is affected.
3. Is there a fix for GHSA-7852-W36X-6MF6? Yes. GHSA-7852-W36X-6MF6 is fixed in 5.5.40, 5.6.15. Upgrade to this version or later.
4. Is GHSA-7852-W36X-6MF6 exploitable, and should I be worried? Whether GHSA-7852-W36X-6MF6 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
5. What actually determines whether GHSA-7852-W36X-6MF6 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
6. How do I fix GHSA-7852-W36X-6MF6?
   • Upgrade laravel/framework to 5.5.40 or later
   • Upgrade laravel/framework to 5.6.15 or later

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