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CVE-2019-11254

Kubernetes API Server denial of service vulnerability from malicious YAML payloads

6.5 MediumFix available

The Kubernetes API Server component in versions 1.1-1.14, and versions prior to 1.15.10, 1.16.7 and 1.17.3 allows an authorized user who sends malicious YAML payloads to cause the kube-apiserver to consume excessive CPU cycles while parsing YAML.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

3.16%Up 2.3 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 6.5

Kubernetes API Server denial of service vulnerability from malicious YAML payloads

The Kubernetes API Server component in versions 1.1-1.14, and versions prior to 1.15.10, 1.16.7 and 1.17.3 allows an authorized user who sends malicious YAML payloads to cause the kube-apiserver to consume excessive CPU cycles while parsing YAML.

Record
CVE-2019-11254
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-1050
Updated
2026-11-02
EUVDEUVD-2021-2608 6.5

The Kubernetes API Server component in versions 1.1-1.14, and versions prior to 1.15.10, 1.16.7 and 1.17.3 allows an authorized user who sends malicious YAML payloads to cause the kube-apiserver to consume excessive CPU cycles while parsing YAML.

Record
EUVD-2021-2608
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-wxc4-f4m6-wwqv 6.5

Excessive Platform Resource Consumption within a Loop in Kubernetes

The Kubernetes API Server component in versions 1.1-1.14, and versions prior to 1.15.10, 1.16.7 and 1.17.3 allows an authorized user who sends malicious YAML payloads to cause the kube-apiserver to consume excessive CPU cycles while parsing YAML.

Record
GHSA-wxc4-f4m6-wwqv
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-1050
Updated
2026-11-02
NVD 6.5

The Kubernetes API Server component in versions 1.1-1.14, and versions prior to 1.15.10, 1.16.7 and 1.17.3 allows an authorized user who sends malicious YAML payloads to cause the kube-apiserver to consume excessive CPU cycles while parsing YAML.

Record
CVE-2019-11254
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
4.0 MediumAV:N/AC:L/Au:S/C:N/I:N/A:P
Weakness
CWE-1050
Updated
2026-11-02
OSVAZL-41568 6.5

CVE-2019-11254 affecting package packer 1.9.5-23

The Kubernetes API Server component in versions 1.1-1.14, and versions prior to 1.15.10, 1.16.7 and 1.17.3 allows an authorized user who sends malicious YAML payloads to cause the kube-apiserver to consume excessive CPU cycles while parsing YAML.

Record
AZL-41568
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-05
OSVAZL-44445 6.5

CVE-2019-11254 affecting package podman for versions less than 5.6.1-2

The Kubernetes API Server component in versions 1.1-1.14, and versions prior to 1.15.10, 1.16.7 and 1.17.3 allows an authorized user who sends malicious YAML payloads to cause the kube-apiserver to consume excessive CPU cycles while parsing YAML.

Record
AZL-44445
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 11 moreShow less
OSVAZL-44808 6.5

CVE-2019-11254 affecting package buildah for versions less than 1.41.4-2

The Kubernetes API Server component in versions 1.1-1.14, and versions prior to 1.15.10, 1.16.7 and 1.17.3 allows an authorized user who sends malicious YAML payloads to cause the kube-apiserver to consume excessive CPU cycles while parsing YAML.

Record
AZL-44808
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVAZL-44904 6.5

CVE-2019-11254 affecting package delve 1.5.0-16

The Kubernetes API Server component in versions 1.1-1.14, and versions prior to 1.15.10, 1.16.7 and 1.17.3 allows an authorized user who sends malicious YAML payloads to cause the kube-apiserver to consume excessive CPU cycles while parsing YAML.

Record
AZL-44904
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-05
OSV 6.5

The Kubernetes API Server component in versions 1.1-1.14, and versions prior to 1.15.10, 1.16.7 and 1.17.3 allows an authorized user who sends malicious YAML payloads to cause the kube-apiserver to consume excessive CPU cycles while parsing YAML.

Record
CVE-2019-11254
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2019-11254 6.5

The Kubernetes API Server component in versions 1.1-1.14, and versions prior to 1.15.10, 1.16.7 and 1.17.3 allows an authorized user who sends malicious YAML payloads to cause the kube-apiserver to consume excessive CPU cycles while parsing YAML.

Record
DEBIAN-CVE-2019-11254
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVGHSA-wxc4-f4m6-wwqv 6.5

Excessive Platform Resource Consumption within a Loop in Kubernetes

The Kubernetes API Server component in versions 1.1-1.14, and versions prior to 1.15.10, 1.16.7 and 1.17.3 allows an authorized user who sends malicious YAML payloads to cause the kube-apiserver to consume excessive CPU cycles while parsing YAML.

Record
GHSA-wxc4-f4m6-wwqv
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-1050
Updated
2026-11-02
OSVRHSA-2020:2413 7.5

Red Hat Security Advisory: OpenShift Container Platform 4.5 package security update

Record
RHSA-2020:2413
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2020:2479 6.5

Red Hat Security Advisory: OpenShift Container Platform 3.11 atomic-openshift security update

Record
RHSA-2020:2479
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2019-11254 6.5

The Kubernetes API Server component in versions 1.1-1.14, and versions prior to 1.15.10, 1.16.7 and 1.17.3 allows an authorized user who sends malicious YAML payloads to cause the kube-apiserver to consume excessive CPU cycles while parsing YAML.

Record
UBUNTU-CVE-2019-11254
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVGO-2020-0036 No score

Excessive resource consumption in YAML parsing in gopkg.in/yaml.v2

Due to unbounded aliasing, a crafted YAML file can cause consumption of significant system resources. If parsing user supplied input, this may be used as a denial of service vector.

Record
GO-2020-0036
Updated
2026-11-02
OSVopenSUSE-SU-2024:11911-1 No score

etcd-3.5.2-1.1 on GA media

These are all security issues fixed in the etcd-3.5.2-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11911-1
Updated
2026-11-02
OSVopenSUSE-SU-2025:0003-1 No score

Security update for etcd

This update for etcd fixes the following issues:

Update to version 3.5.12:

  • Bump golang.org/x/crypto to v0.17+ to address CVE-2023-48795
  • test: fix TestHashKVWhenCompacting: ensure all goroutine finished
  • print error log when creating peer listener failed
  • mvcc: Printing etcd backend database related metrics inside scheduleCompaction function
  • dependency: update go version to 1.20.13
  • commit bbolt transaction if there is any pending deleting operations
  • add tests to test tx delete consistency.
  • Don't flock snapshot files
  • Backport adding digest for etcd base image.
  • Add a unit tests and missing flags in etcd help.
  • Add missing flag in etcd help.
  • Backport testutils.ExecuteUntil to 3.5 branch
  • member replace e2e test
  • Check if be is nil to avoid panic when be is overriden with nil by recoverSnapshotBackend on line 517
  • Don't redeclare err and snapshot variable, fixing validation of consistent index and closing database on defer
  • test: enable gofail in release e2e test.
  • [3.5] backport health check e2e tests.
  • tests: Extract e2e cluster setup to separate package
  • Update to version 3.5.11:

    • etcdserver: add linearizable_read check to readyz.
    • etcd: Update go version to 1.20.12
    • server: disable redirects in peer communication
    • etcdserver: add metric counters for livez/readyz health checks.
    • etcdserver: add livez and ready http endpoints for etcd.
    • http health check bug fixes
    • server: Split metrics and health code
    • server: Cover V3 health with tests
    • server: Refactor health checks
    • server: Run health check tests in subtests
    • server: Rename test case expect fields
    • server: Use named struct initialization in healthcheck test
    • Backport server: Don't follow redirects when checking peer urls.
    • Backport embed: Add tracing integration test.
    • Backport server: Have tracingExporter own resources it initialises.
    • Backport server: Add sampling rate to distributed tracing.
    • upgrade github.com/stretchr/testify,google.golang.org/genproto/googleapis/api,google.golang.org/grpc to make it consistent
    • CVE-2023-47108: Backport go.opentelemetry.io/[email protected] and go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/[email protected]
    • github workflow: run arm64 tests on every push
    • etcd: upgrade go version from 1.20.10 to 1.20.11
    • bump bbolt to 1.3.8 for etcd 3.5
    • 3.5: upgrade gRPC-go to 1.58.3
    • Backport corrupt check test fix 'etcd server shouldn't wait for the ready notification infinitely on startup'
    • etcdserver: add cluster id check for hashKVHandler
    • [release-3.5]: upgrade gRPC-go to v1.52.0
    • backport #14125 to release-3.5: Update to grpc-1.47 (and fix the connection-string format)
    • Return to default write scheduler since golang.org/x/[email protected] started using round robin
    • Bump go to v1.20.10 Part of https://github.com/etcd-io/etcd/issues/16740
    • bump golang.org/x/net to 0.17.0 Part of https://github.com/etcd-io/etcd/issues/16740
    • etcd: upgrade go version to 1.20.9
    • Remove obsolete http 1.0 version.
    • fix:Ensure that go version is only defined in one file for release-3.5
    • Fix panic in etcd validate secure endpoints
    • dependency: bump golang to 1.20.8
    • Backport redirect metrics data into file to reduce output.
    • test.sh: increase timeout for grpcproxy test
    • test: add v3 curl test to cover maintenance hash/hashkv REST API
    • api: fix duplicate gateway url issue
    • pkg: add a verification on the pagebytes which must be > 0
    • tests: Backport deflake for TestWatchDelay
    • tests: Backport deflake for TestPageWriterRandom
    • Backport adding unit test for socket options.
    • Backport export reuse-port and reuse-address
    • Fix goword failure in rafthttp/transport.go.
    • Backport update to golang 1.20 minor release.
    • bump go version to 1.19.12
    • Update workflows to use makefile recipes for unit, integration & e2e-release.
    • Backport Makefile recipes for common test…
Record
openSUSE-SU-2025:0003-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
gopkg.in/yaml.v2
Go
before 2.2.8
2.2.8
github.com/go-yaml/yaml
Go
through 2.1.0 None known
packer
Azure Linux:3
through 1.9.5-23 None known
podman
Azure Linux:3
before 5.6.1-2
5.6.1-2
buildah
Azure Linux:3
before 1.41.4-2
1.41.4-2
delve
Azure Linux:3
through 1.5.0-16 None known
kubernetes
Debian:12
before 1.17.4-1
1.17.4-1
kubernetes
Debian:13
before 1.17.4-1
1.17.4-1
kubernetes
Debian:14
before 1.17.4-1
1.17.4-1
github.com/go-yaml/yaml
Go
All versions None known
Show 21 moreShow less
Affected packages
PackageAffectedFixed
openshift
Red Hat:openshift:4.5::el7
before 0:4.5.0-202007012112.p0.git.0.582d7fc.el7
0:4.5.0-202007012112.p0.git.0.582d7fc.el7
openshift-hyperkube
Red Hat:openshift:4.5::el7
before 0:4.5.0-202007012112.p0.git.0.582d7fc.el7
0:4.5.0-202007012112.p0.git.0.582d7fc.el7
openshift
Red Hat:openshift:4.5::el8
before 0:4.5.0-202007012112.p0.git.0.582d7fc.el8
0:4.5.0-202007012112.p0.git.0.582d7fc.el8
openshift-hyperkube
Red Hat:openshift:4.5::el8
before 0:4.5.0-202007012112.p0.git.0.582d7fc.el8
0:4.5.0-202007012112.p0.git.0.582d7fc.el8
machine-config-daemon
Red Hat:openshift:4.5::el8
before 0:4.5.0-202007012112.p0.git.2527.d12c3da.el8
0:4.5.0-202007012112.p0.git.2527.d12c3da.el8
atomic-openshift
Red Hat:openshift:3.11::el7
before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-clients
Red Hat:openshift:3.11::el7
before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-clients-redistributable
Red Hat:openshift:3.11::el7
before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-docker-excluder
Red Hat:openshift:3.11::el7
before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-excluder
Red Hat:openshift:3.11::el7
before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-hyperkube
Red Hat:openshift:3.11::el7
before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-hypershift
Red Hat:openshift:3.11::el7
before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-master
Red Hat:openshift:3.11::el7
before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-node
Red Hat:openshift:3.11::el7
before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-pod
Red Hat:openshift:3.11::el7
before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-sdn-ovs
Red Hat:openshift:3.11::el7
before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-template-service-broker
Red Hat:openshift:3.11::el7
before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
atomic-openshift-tests
Red Hat:openshift:3.11::el7
before 0:3.11.232-1.git.0.a5bc32f.el7
0:3.11.232-1.git.0.a5bc32f.el7
etcd
openSUSE:Tumbleweed
before 3.5.2-1.1
3.5.2-1.1
etcd
SUSE:Package Hub 15 SP6
before 3.5.12-bp156.4.3.1
3.5.12-bp156.4.3.1
etcd
openSUSE:Leap 15.6
before 3.5.12-bp156.4.3.1
3.5.12-bp156.4.3.1

History

History
RecordedChangedSources
affected
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-11254 is a medium vulnerability (CVSS 6.5) in Kubernetes, published April 1, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.16%, the 88th percentile. Fixed in gopkg.in/yaml.v2 2.2.8.

References

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Left out here: the rest of 1 source description. The JSON record has them.

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