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, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-98j6-67v3-mw34 can be triaged on real exposure rather than presence alone.

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

Not in CISA KEV

GHSA-98j6-67v3-mw34 — auth0/symfony

GHSA-98j6-67v3-mw34 is a remote code execution vulnerability in auth0/symfony. A fix is available for auth0/symfony — see the affected versions and patch details below.

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

Exploitation data as of Feb 4, 2026 · OSV.dev, FIRST.org (EPSS)

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`composer require auth0/symfony:^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, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-98j6-67v3-mw34 can be triaged on real exposure rather than presence alone.

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 Security finds GHSA-98j6-67v3-mw34 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

Scan my dependencies How O3 SCA works