GHSA-x8vp-gf4q-mw5j
HIGHSymfony allows changing the environment through a query
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Blast Radius
symfony/runtime🐘symfony/runtime🐘symfony/runtime🐘symfony/symfony🐘symfony/symfony🐘symfony/symfonyReal-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
Description
When the register_argc_argv php directive is set to on , and users call any URL with a special crafted query string, they are able to change the environment or debug mode used by the kernel when handling the request.
Resolution
The SymfonyRuntime now ignores the argv values for non-cli SAPIs PHP runtimes
The patch for this issue is available here for branch 5.4.
Credits
We would like to thank Vladimir Dusheyko for reporting the issue and Wouter de Jong for providing the fix.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | symfony/runtime | ≥ 5.3.0&&< 5.4.46 | 5.4.46 |
| 🐘Packagist | symfony/runtime | ≥ 6.0.0&&< 6.4.14 | 6.4.14 |
| 🐘Packagist | symfony/runtime | ≥ 7.0.0&&< 7.1.7 | 7.1.7 |
| 🐘Packagist | symfony/symfony | ≥ 5.3.0&&< 5.4.46 | 5.4.46 |
| 🐘Packagist | symfony/symfony | ≥ 6.0.0&&< 6.4.14 | 6.4.14 |
| 🐘Packagist | symfony/symfony | ≥ 7.0.0&&< 7.1.7 | 7.1.7 |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for symfony/runtime. 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 symfony/runtime to 5.4.46 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-x8vp-gf4q-mw5j 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-x8vp-gf4q-mw5j 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-x8vp-gf4q-mw5j. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-x8vp-gf4q-mw5j in your dependencies?
O3 detects GHSA-x8vp-gf4q-mw5j across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.