GHSA-mmwx-rj87-vfgr
MEDIUMDNSJava affected by KeyTrap - NSEC3 closest encloser proof can exhaust CPU resources
Blast Radius
dnsjava:dnsjava☕org.jitsi:dnssecjavaReal-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
Impact
Users using the ValidatingResolver for DNSSEC validation can run into CPU exhaustion with specially crafted DNSSEC-signed zones.
Patches
Users should upgrade to dnsjava v3.6.0
Workarounds
Although not recommended, only using a non-validating resolver, will remove the vulnerability.
References
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | dnsjava:dnsjava | ≥ 3.5.0&&< 3.6.0 | 3.6.0 |
| ☕Maven | org.jitsi:dnssecjava | all versions | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for dnsjava:dnsjava. 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 dnsjava:dnsjava to 3.6.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mmwx-rj87-vfgr 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-mmwx-rj87-vfgr 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-mmwx-rj87-vfgr. 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-mmwx-rj87-vfgr in your dependencies?
O3 detects GHSA-mmwx-rj87-vfgr across Maven dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.