CVE-2016-3109 is a critical-severity (CVSS 9.8) Improper Input Validation vulnerability in shopware/shopware. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for shopware/shopware — see the affected versions and patch details below.
Shopware RCE Vulnerability
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
shopware/shopware🐘shopware/shopwareReal-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
The backend/Login/load/ script in Shopware before 5.1.5 allows remote attackers to execute arbitrary code.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | shopware/shopware | all versions | 4.3.7composer require shopware/shopware:^4.3.7 |
| 🐘Packagist | shopware/shopware | ≥ 5.0.0&&< 5.1.5 | 5.1.5composer require shopware/shopware:^5.1.5 |
Affected Products
shopwareshopwareResearch 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 shopware/shopware, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update shopware/shopware to 4.3.7 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-3109 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.
Frequently Asked Questions
Is CVE-2016-3109 in your dependencies?
Find it across Packagist, including transitive dependencies.