GHSA-q5r4-cfpx-h6fh
MEDIUMGHSA-q5r4-cfpx-h6fh is a medium-severity (CVSS 5.5) CWE-130 vulnerability in org.apache.ant:ant. O3 Security confirms whether GHSA-q5r4-cfpx-h6fh is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Improper Handling of Length Parameter Inconsistency in Apache Ant
Real-World Exposure
org.apache.ant:ant☕org.apache.ant:antReal-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
When reading a specially crafted TAR archive an Apache Ant build can be made to allocate large amounts of memory that finally leads to an out of memory error, even for small inputs. This can be used to disrupt builds using Apache Ant. Apache Ant prior to 1.9.16 and 1.10.11 were affected.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | org.apache.ant:ant | all versions | 1.9.16 |
| ☕Maven | org.apache.ant:ant | ≥ 1.10.0&&< 1.10.11 | 1.10.11 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.ant:ant. 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 org.apache.ant:ant to 1.9.16 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q5r4-cfpx-h6fh 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-q5r4-cfpx-h6fh 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-q5r4-cfpx-h6fh. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
OpenShift Container Platform 4 (OCP) ships affected version of Apache Ant in the ose-metering-hive container, however the metering operator is deprecated since 4.6[1]. This issue is not currently planned to be addressed in future updates and hence ose-metering-hive container has been marked as 'will not fix'. [1]…
Frequently Asked Questions
Is GHSA-q5r4-cfpx-h6fh in your dependencies?
O3 detects GHSA-q5r4-cfpx-h6fh across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.