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Back to active CVEs
High · CVSS 7.5CVE-2019-11253GHSA-PMQP-H87C-MR78

XML Entity Expansion and Improper Input Validation in Kubernetes API serverCVE-2019-11253

Answer in brief

CVE-2019-11253 records a High severity (CVSS 7.5) vulnerability in XML Entity Expansion and Improper Input Validation in Kubernetes API server. The current sources do not mark it as known exploited. The current feed maps k8s.io/kubernetes (go), k8s.io/kubernetes (go), k8s.io/kubernetes (go), k8s.io/kubernetes (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published May 18, 2021Updated Sep 10, 2026Source checked Oct 25, 2026First seen by HOL Sep 10, 2026Material review Sep 10, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
4 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps k8s.io/kubernetes (go), k8s.io/kubernetes (go), k8s.io/kubernetes (go), k8s.io/kubernetes (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
k8s.io/kubernetesgo>=1.0.0 <1.13.121.13.12
k8s.io/kubernetesgo>=1.14.0 <1.14.81.14.8
k8s.io/kubernetesgo>=1.15.0 <1.15.51.15.5
k8s.io/kubernetesgo>=1.16.0 <1.16.21.16.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for k8s.io/kubernetes, k8s.io/kubernetes, k8s.io/kubernetes.
  2. 2Review the reported fix. Update k8s.io/kubernetes to 1.13.12; k8s.io/kubernetes to 1.14.8; k8s.io/kubernetes to 1.15.5; k8s.io/kubernetes to 1.16.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    May 18, 2021

    Evidence: source:osv:source_dates:source-dates:record

  2. Source modified

    Sep 10, 2026

    Evidence: source:osv:source_dates:source-dates:record

  3. First seen by HOL

    Sep 10, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • GitHub security advisorygist.github.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencegroups.google.com
  • NVD vulnerability recordnvd.nist.gov
  • Source referencepkg.go.dev
  • Source referencesecurity.netapp.com
Upstream source 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. ### Specific Go Packages Affected k8s.io/kubernetes/pkg/apiserver

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
OSV
Source checked
Oct 25, 2026
References
10 linked sources
Open source record