CVE-2026-44247
MEDIUMCVE-2026-44247 is a medium-severity (CVSS 6.8) vulnerability in volcano.sh/volcano. O3 Security confirms whether CVE-2026-44247 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Volcano: Webhook server vulnerable to OOM due to unbounded HTTP request body size
Real-World Exposure
volcano.sh/volcano🐹volcano.sh/volcano🐹volcano.sh/volcanoReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Volcano is a Kubernetes-native batch scheduling system. Prior to v1.14.2, v1.13.3, and v1.12.4, the Volcano webhook server does not enforce a size limit on incoming HTTP request bodies. Any in-cluster pod that can reach the webhook endpoint may send an arbitrarily large request body, potentially causing the webhook server to be killed by OOM. All Volcano deployments with the webhook server exposed to in-cluster traffic are affected. This vulnerability is fixed in v1.14.2, v1.13.3, and v1.12.4.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | volcano.sh/volcano | all versions | 1.12.4 |
| 🐹Go | volcano.sh/volcano | ≥ 1.13.0&&< 1.13.3 | 1.13.3 |
| 🐹Go | volcano.sh/volcano | ≥ 1.14.0&&< 1.14.2 | 1.14.2 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for volcano.sh/volcano. 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 volcano.sh/volcano to 1.12.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-44247 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 CVE-2026-44247 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 CVE-2026-44247. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-44247 in your dependencies?
O3 detects CVE-2026-44247 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.