CVE-2019-11253

Kubernetes API Server JSON/YAML parsing vulnerable to resource exhaustion attack

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.

Affected

Kubernetes

CVSS v3.1 NVD

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 NVD

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

25.94% chance of exploitation in the next 30 days, 98th percentile

Nuclei

high · CWE-400

Published

2019-10-17

Updated

2024-09-16

Proof-of-concept exploits (1)

• kubernetes/kubernetes/issues/83253128231★ · 2026-10-15

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2019/CVE-2019-11253.yaml

Security advisories

• https://access.redhat.com/errata/RHSA-2019:3239
• https://access.redhat.com/errata/RHSA-2019:3811
• https://access.redhat.com/errata/RHSA-2019:3905
• https://security.netapp.com/advisory/ntap-20191031-0006
• advisories/GHSA-pmqp-h87c-mr78

References

• CVE Record
• NVD entry

Related

• CVE-2020-8554
• CVE-2020-8559