CVE-2019-11253
Improper input validation in the Kubernetes API server in versions v1.0-1.12 and versions prior to v1.13.12, v1.14.8, v1.15.5, and v1.16.2 allows authorized users to send malicious YAML or JSON payloads, causing the API server to consume excessive CPU…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 25.9%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
Improper input validation in the Kubernetes API server in versions v1.0-1.12 and versions prior to v1.13.12, v1.14.8, v1.15.5, and v1.16.2 allows authorized users to send malicious YAML or JSON payloads, causing the API server to consume excessive CPU or memory, potentially crashing and becoming unavailable. Prior to v1.14.0, default RBAC policy authorized anonymous users to submit requests that could trigger this vulnerability. Clusters upgraded from a version prior to v1.14.0 keep the more permissive policy by default for backwards compatibility.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 25.94% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20, CWE-776
- Affected
- kubernetes/kubernetes · redhat/openshift container platform
- Source
- jordan@liggitt.net
EPSS 25.9% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://access.redhat.com/errata/RHSA-2019:3239Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3811Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3905Third Party Advisory
- https://github.com/kubernetes/kubernetes/issues/83253Exploit, Issue Tracking, Mitigation, Third Party Advisory
- https://groups.google.com/forum/#%21topic/kubernetes-security-announce/jk8polzSUxsPermissions Required
- https://security.netapp.com/advisory/ntap-20191031-0006/Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3239Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3811Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:3905Third Party Advisory
- https://github.com/kubernetes/kubernetes/issues/83253Exploit, Issue Tracking, Mitigation, Third Party Advisory
- https://groups.google.com/forum/#%21topic/kubernetes-security-announce/jk8polzSUxsPermissions Required
- https://security.netapp.com/advisory/ntap-20191031-0006/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.