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Not in CISA KEV
HIGH severity

CVE-2019-12799 — shopware

HIGHFix: rapid7/metasploit-framework#11828

CVE-2019-12799 is a high-severity (CVSS 8.8) Deserialization of Untrusted Data vulnerability in shopware/shopware. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Shopware Insecure Deserialization Vulnerability

Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Oct 31, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
54.1%probability of exploitation in next 30 days
High Risk-0.63%
Lower risk than most CVEs99th percentile — riskier than 99% of all scored CVEsHighest risk
15.1%31.3%47.6%63.8%24.2%54.1%May 26Aug 26Oct 26

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

1 pkg affected
🐘shopware/shopware

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

In createInstanceFromNamedArguments in Shopware through 5.6.x, a crafted web request can trigger a PHP object instantiation vulnerability, which can result in an arbitrary deserialization if the right class is instantiated. An attacker can leverage this deserialization to achieve remote code execution. NOTE: this issue is a bypass for a CVE-2017-18357 whitelist patch.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐘Packagistshopware/shopware≥ 5.3.0No fix

Affected Products

1 product · 1 configurations
Application
shopwareshopware
≤ 5.6.0
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

In createInstanceFromNamedArguments in Shopware through 5.6.x, a crafted…

github.comMetasploitOct 2020

Detection & mitigation playbook

Open-source dependency

  1. Detect

    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.

  2. Remediation status

    The records we use list no patched version of shopware/shopware for CVE-2019-12799. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    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

In createInstanceFromNamedArguments in Shopware through 5.6.x, a crafted web request can trigger a PHP object instantiation vulnerability, which can result in an arbitrary deserialization if the right class is instantiated. An attacker can leverage this deserialization to achieve remote code execution. NOTE: this issue is a bypass for a CVE-2017-18357 whitelist patch.
O3 Security · Impact-Aware SCA

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CVE-2019-12799: shopware RCE (High 8.8)