CVE-2026-44247: Volcano is a Kubernetes-native batch scheduling system

Routine

MEDIUM 6.8WATCHLISTUPGRADE

CVE-2026-44247 is a medium-severity flaw (CVSS 6.8) affecting volcano. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 vulnerab

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-400, CWE-770
Published	2026-05-27
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: linuxfoundation

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-27 22:16 UTCPublished CVE record published
2026-06-17 10:50 UTCUpdated Record last modified

linuxfoundation volcano UPGRADE

Affected: < 1.12.4 · >= 1.13.0 and < 1.13.3 · >= 1.14.0 and < 1.14.2

Fixed in: 1.12.4, 1.13.3, 1.14.2

Safe to downgrade to: a release before 1.13.0

1. Check installed version

apt-cache policy volcano || rpm -q volcano || volcano --version

2. UPGRADE to 1.12.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade volcano

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade volcano

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.13.0 (Debian / Ubuntu)

apt-cache madison volcano sudo apt install volcano=<VERSION_BEFORE_1.13.0> sudo apt-mark hold volcano

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list volcano sudo dnf downgrade volcano-<VERSION_BEFORE_1.13.0> sudo dnf versionlock add volcano

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-44247?

volcano: upgrade to 1.12.4, 1.13.3, 1.14.2. Exact commands for each OS are on this page.

Is CVE-2026-44247 being exploited?

CVE-2026-44247 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-44247 affect?

CVE-2026-44247 affects volcano. Severity is medium (CVSS 6.8). 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

How urgent is CVE-2026-44247?

Priority 30/100. On your watchlist

Software pages

Kubernetes vulnerabilities

References

← Back to latest CVEs