Is CVE-2026-44247 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-44247 being exploited in the wild.

How severe is CVE-2026-44247?

Medium severity, with a CVSS score of 6.8, published 27 May 2026.

Which products and versions are affected?

volcano.sh/volcano (Go) SEMVER:introduced=0,fixed=1.12.4, SEMVER:introduced=0,fixed=1.12.4,introduced=1.13.0,fixed=1.13.3,introduced=1.14.0,fixed=1.14.2; Volcano-sh Volcano < v1.14.2, < v1.13.3, < v1.12.4.

Is there a fix for CVE-2026-44247?

Yes. volcano.sh/volcano (Go): upgrade to 1.12.4, 1.14.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-44247 attacked?

It is attacked from the adjacent network, in a software library.

Am I affected by CVE-2026-44247?

Check whether you run volcano.sh/volcano (Go) or Volcano-sh Volcano at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-44247: Volcano Webhook Server denial of service via unbounded HTTP requests

Q: Is there a fix for CVE-2026-44247?

Yes. volcano.sh/volcano (Go): upgrade to 1.12.4, 1.14.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-44247 attacked?

It is attacked from the adjacent network, in a software library.

Q: Am I affected by CVE-2026-44247?

Check whether you run volcano.sh/volcano (Go) or Volcano-sh Volcano at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-44247 · Severity: medium · CVSS 6.8 · Published 2026-05-27

Volcano, a batch scheduling system for Kubernetes, contains a vulnerability in its webhook server where it fails to limit the size of incoming data requests. An attacker with access to the internal network can send massive amounts of data to this server, causing it to crash due to memory exhaustion. This can disrupt the scheduling of high-performance computing workloads and impact the overall availability of the cluster management system.

Technologies: volcano.sh/volcano (Go). Vendors: Go.

Quick answers

Is CVE-2026-44247 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-44247 being exploited in the wild.
How severe is CVE-2026-44247?: Medium severity, with a CVSS score of 6.8, published 27 May 2026.
Which products and versions are affected?: volcano.sh/volcano (Go) SEMVER:introduced=0,fixed=1.12.4, SEMVER:introduced=0,fixed=1.12.4,introduced=1.13.0,fixed=1.13.3,introduced=1.14.0,fixed=1.14.2; Volcano-sh Volcano < v1.14.2, < v1.13.3, < v1.12.4.
Is there a fix for CVE-2026-44247?: Yes. volcano.sh/volcano (Go): upgrade to 1.12.4, 1.14.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-44247 attacked?: It is attacked from the adjacent network, in a software library.
Am I affected by CVE-2026-44247?: Check whether you run volcano.sh/volcano (Go) or Volcano-sh Volcano at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

volcano.sh/volcano (Go): upgrade to 1.12.4, 1.14.2 or later
```
go get volcano.sh/volcano@v1.14.2
```

Technical details

The Volcano webhook server fails to implement a maximum size limit for HTTP request bodies (CWE-770). An attacker operating a pod within the same cluster can send an arbitrarily large HTTP request to the webhook endpoint. This uncontrolled resource consumption leads to the webhook server process being terminated by the operating system's Out-of-Memory (OOM) killer. The vulnerability is reachable via the network from adjacent in-cluster traffic and requires low privileges. Patches are available in versions 1.12.4, 1.13.3, and 1.14.2.

Affected products

volcano-sh Volcano < 1.12.4, >= 1.13.0 < 1.13.3, >= 1.14.0 < 1.14.2

Identifiers

CVE-2026-44247
GHSA-8wxp-xxp2-rcgx
GO-2026-5269

Timeline

2026-05-08: disclosed
2026-05-08: advisory
2026-05-08: patched

References

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