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laravel-auth0 SDK Vulnerable to Brute Force Authentication Tags of CookieStore SessionsGHSA-9fwj-9mjf-rhj3

CRITICALFix: auth0/laravel-auth0@be2c59a

GHSA-9fwj-9mjf-rhj3 is a critical-severity (CVSS 9.1) vulnerability in auth0/login. A fix is available for auth0/login — see the affected versions and patch details below.

Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Feb 4, 2026 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
🐘auth0/login

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Overview Session cookies of applications using the laravel-auth0 SDK configured with CookieStore have authentication tags that can be brute forced, which may result in unauthorized access.

Am I Affected? You are affected by this vulnerability if you meet the following pre-conditions:

  1. Applications using laravel-auth0 SDK with version <=7.16.0
  2. laravel-auth0 SDK uses the Auth0-PHP SDK with version 8.0.0-BETA1 or higher and below 8.14.0.
  3. Session storage configured with CookieStore.

Fix Upgrade Auth0/laravel-auth0 to v7.17.0. As an additional precautionary measure, we recommend rotating your cookie encryption keys. Note that once updated, any previous session cookies will be rejected.

Acknowledgement Okta would like to thank Félix Charette for discovering this vulnerability.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistauth0/loginall versions7.17.0composer require auth0/login:^7.17.0

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for auth0/login, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update auth0/login to 7.17.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-9fwj-9mjf-rhj3 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

**Overview** Session cookies of applications using the laravel-auth0 SDK configured with CookieStore have authentication tags that can be brute forced, which may result in unauthorized access. **Am I Affected?** You are affected by this vulnerability if you meet the following pre-conditions: 1. Applications using laravel-auth0 SDK with version <=7.16.0 2. laravel-auth0 SDK uses the Auth0-PHP SDK with version 8.0.0-BETA1 or higher and below 8.14.0. 3. Session storage configured with CookieStore. **Fix** Upgrade Auth0/laravel-auth0 to v7.17.0. As an additional precautionary measure, we recom
O3 Security · Impact-Aware SCA

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laravel-auth0 SDK Vulnerable to Brute Force…