How severe is GHSA-98j6-67v3-mw34?

No CVSS score has been assigned to GHSA-98j6-67v3-mw34 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-98j6-67v3-mw34?

GHSA-98j6-67v3-mw34 affects the following packages: auth0/symfony (Packagist). Ecosystems affected: Packagist.

How do I fix GHSA-98j6-67v3-mw34?

Update auth0/symfony to 5.1.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-98j6-67v3-mw34 is resolved across your whole dependency graph.

How do I detect GHSA-98j6-67v3-mw34 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for auth0/symfony. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

How do I mitigate GHSA-98j6-67v3-mw34 if there is no patch (or I can't update yet)?

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.

How does O3 Security protect against GHSA-98j6-67v3-mw34?

O3 pinpoints whether GHSA-98j6-67v3-mw34 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is GHSA-98j6-67v3-mw34 actively exploited in the wild?

No public exploit code has been indexed for GHSA-98j6-67v3-mw34 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-98j6-67v3-mw34 published, and has it been updated?

GHSA-98j6-67v3-mw34 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

GHSA-98j6-67v3-mw34

GHSA-98j6-67v3-mw34 is a remote code execution vulnerability in auth0/symfony. O3 Security confirms whether GHSA-98j6-67v3-mw34 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Auth0 Symfony SDK Deserialization of Untrusted Data vulnerability

Published

Jun 6, 2025

Updated

Feb 4, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Real-World Exposure

1 pkg affected

🐘auth0/symfony

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 Auth0 Symfony 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 the Auth0 Symfony SDK, versions between 5.0.0 BETA-0 to 5.0.0.
Auth0 Symfony SDK uses the Auth0-PHP SDK with version 8.0.0-BETA3 to 8.3.0.

Fix Upgrade Auth0/symfony to the latest version (v5.4.0).

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/symfony`	≥ 5.0.0-BETA0&&< 5.1.0	5.1.0

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for auth0/symfony. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update auth0/symfony to 5.1.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-98j6-67v3-mw34 is resolved across your whole dependency graph.
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.
How O3 protects you
O3 pinpoints whether GHSA-98j6-67v3-mw34 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-98j6-67v3-mw34. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

**Overview** The Auth0 Symfony 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 the Auth0 Symfony SDK, versions between 5.0.0 BETA-0 to 5.0.0. 2. Auth0 Symfony SDK uses the Auth0-PHP SDK with version 8.0.0-BETA3 to 8.3.0. **Fix** Upgrade Auth0/symfony to the latest ve

O3 Security · Impact-Aware SCA

Is GHSA-98j6-67v3-mw34 in your dependencies?

O3 detects GHSA-98j6-67v3-mw34 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works