Volcano: Webhook server vulnerable to OOM due to unbounded HTTP request body size

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.

Problem type

Affected products

volcano-sh

volcano

>= 1.14.0-alpha.0, < 1.14.2 - AFFECTED

>= 1.13.0, < 1.13.3 - AFFECTED

< 1.12.4 - AFFECTED

References

https://github.com/volcano-sh/volcano/security/advisories/GHSA-8wxp-xxp2-rcgx

https://github.com/volcano-sh/volcano/security/advisories/GHSA-8wxp-xxp2-rcgx

x_refsource_CONFIRM

GitHub Security Advisories

GHSA-8wxp-xxp2-rcgx

Volcano's webhook server vulnerable to OOM due to unbounded HTTP request body size

https://github.com/advisories/GHSA-8wxp-xxp2-rcgx

Impact

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.

Patches

This issue will be fixed in the following versions:

v1.14.2
v1.13.3
v1.12.4

Users running versions below these should upgrade accordingly.

Workarounds

No known workarounds. Upgrade to the patched versions listed above.

github.com

https://github.com/volcano-sh/volcano/security/advisories/GHSA-8wxp-xxp2-rcgx

github.com

https://github.com/advisories/GHSA-8wxp-xxp2-rcgx

JSON source

https://cveawg.mitre.org/api/cve/CVE-2026-44247

Click to expand

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