How severe is GHSA-c42h-56wx-h85q?

No CVSS score has been assigned to GHSA-c42h-56wx-h85q yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-c42h-56wx-h85q?

GHSA-c42h-56wx-h85q affects the following packages: auth0/login (Packagist). Ecosystems affected: Packagist.

How do I fix GHSA-c42h-56wx-h85q?

Update auth0/login to 7.2.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-c42h-56wx-h85q is resolved across your whole dependency graph.

How do I detect GHSA-c42h-56wx-h85q in my Packagist dependencies?

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.

How do I mitigate GHSA-c42h-56wx-h85q if there is no patch (or I can't update yet)?

Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Is GHSA-c42h-56wx-h85q actively exploited in the wild?

No public exploit code has been indexed for GHSA-c42h-56wx-h85q yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-c42h-56wx-h85q published, and has it been updated?

GHSA-c42h-56wx-h85q was published on June 6, 2025 and was last updated on February 4, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

laravel-auth0 SDK Deserialization of Untrusted Data vulnerabilityGHSA-c42h-56wx-h85q

GHSA-c42h-56wx-h85q is a remote code execution vulnerability in auth0/login. A fix is available for auth0/login — see the affected versions and patch details below.

Published

Jun 6, 2025

Updated

Feb 4, 2026

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 The laravel-auth0 SDK contains a critical vulnerability due to insecure deserialization of cookie data. If exploited, since SDKs process cookie content without prior authentication, a threat actor could send a specially crafted cookie containing malicious serialized data.

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

Applications using laravel-auth0 SDK, versions between 7.0.0-BETA1 to 7.2.1.
Laravel-auth0 SDK uses the Auth0-PHP SDK with version 8.0.0-BETA3 to 8.3.0.

Fix Upgrade Auth0/laravel-auth0 to the latest version (v7.17.0).

Acknowledgement Okta would like to thank Andreas Forsblom for discovering this vulnerability.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`auth0/login`	≥ 7.0.0-BETA1&&< 7.2.2	7.2.2`composer require auth0/login:^7.2.2`

Detection & mitigation playbook

Open-source dependency

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.
Fix
Update auth0/login to 7.2.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-c42h-56wx-h85q is resolved across your whole dependency graph.
Workarounds
Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Frequently Asked Questions

**Overview** The laravel-auth0 SDK contains a critical vulnerability due to insecure deserialization of cookie data. If exploited, since SDKs process cookie content without prior authentication, a threat actor could send a specially crafted cookie containing malicious serialized data. **Am I Affected?** You are affected by this vulnerability if you meet the following preconditions: 1. Applications using laravel-auth0 SDK, versions between 7.0.0-BETA1 to 7.2.1. 2. Laravel-auth0 SDK uses the Auth0-PHP SDK with version 8.0.0-BETA3 to 8.3.0. **Fix** Upgrade Auth0/laravel-auth0 to the latest ve

O3 Security · Impact-Aware SCA

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