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CRITICAL severity

XML External Entity Reference in droolsGHSA-rc57-9r3x-98cq

CRITICALFix: apache/incubator-kie-drools#3808

GHSA-rc57-9r3x-98cq is a critical-severity (CVSS 9.8) XML External Entity (XXE) vulnerability in org.drools:drools-core. A fix is available for org.drools:drools-core — see the affected versions and patch details below.

Also known asCVE-2021-41411
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.3%probability of exploitation in next 30 days
Lower Risk+0.02%
Lower risk than most CVEs71th percentile — riskier than 71% of all scored CVEsHighest risk
0.00%0.60%1.20%1.81%0.3%1.3%May 26Sep 26Nov 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
☕org.drools:drools-core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

drools <=7.59.x is affected by an XML External Entity (XXE) vulnerability in KieModuleMarshaller.java. The Validator class is not used correctly, resulting in the XXE injection vulnerability.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.drools:drools-coreall versions7.60.0.Finalorg.drools:drools-core:7.60.0.Final

Affected Products

1 product · 1 configurations
Application
droolsredhat
< 7.6.0
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.drools:drools-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.drools:drools-core to 7.60.0.Final or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-rc57-9r3x-98cq is resolved across your whole dependency graph.

  3. 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

drools <=7.59.x is affected by an XML External Entity (XXE) vulnerability in KieModuleMarshaller.java. The Validator class is not used correctly, resulting in the XXE injection vulnerability.
O3 Security · Impact-Aware SCA

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XML External Entity Reference in drools (Critical 9.8)