GHSA-gp32-7h29-rpxm is a medium-severity (CVSS 5.3) XML External Entity (XXE) vulnerability in com.puppycrawl.tools:checkstyle. O3 Security confirms whether GHSA-gp32-7h29-rpxm is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Moderate severity vulnerability that affects com.puppycrawl.tools:checkstyle
Real-World Exposure
com.puppycrawl.tools:checkstyleReal-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
Checkstyle prior to 8.18 loads external DTDs by default, which can potentially lead to denial of service attacks or the leaking of confidential information.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | com.puppycrawl.tools:checkstyle | all versions | 8.18 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.puppycrawl.tools:checkstyle. 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 com.puppycrawl.tools:checkstyle to 8.18 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-gp32-7h29-rpxm 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-gp32-7h29-rpxm 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-gp32-7h29-rpxm. 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-gp32-7h29-rpxm in your dependencies?
O3 detects GHSA-gp32-7h29-rpxm across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.