CVE-2019-11243: In Kubernetes v1.12.0-v1.12.4 and v1.13.0, the rest.AnonymousClientConfig() method returns a copy of the provi

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HIGH 8.1REMOTEWATCHLISTUPGRADEMITIGATE

CVE-2019-11243 is a high-severity flaw (CVSS 8.1) affecting kubernetes, trident. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Kubernetes v1.12.0-v1.12.4 and v1.13.0, the rest.AnonymousClientConfig() method returns a copy of the provided config, with credentials removed (bearer token, username/password, and client certificate/key data). In the affected versions, rest.AnonymousClientConfig() did not effectively clear service account credentials loaded using rest.InClusterConfig()

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-271, CWE-212
Published	2019-04-22
Last modified	2026-06-17

Publisher (CNA): Kubernetes · Vendor: kubernetes · netapp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-04-22 15:29 UTCPublished CVE record published
2026-06-17 02:12 UTCUpdated Record last modified

kubernetes kubernetes UPGRADE

Affected: >= 1.12.0 and <= 1.12.4 · 1.13.0

Fixed in: newer than 1.12.4

Safe to downgrade to: a release before 1.12.0

1. Check installed version

apt-cache policy kubernetes || rpm -q kubernetes || kubernetes --version

2. UPGRADE to newer than 1.12.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade kubernetes

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kubernetes

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.12.0 (Debian / Ubuntu)

apt-cache madison kubernetes sudo apt install kubernetes=<VERSION_BEFORE_1.12.0> sudo apt-mark hold kubernetes

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list kubernetes sudo dnf downgrade kubernetes-<VERSION_BEFORE_1.12.0> sudo dnf versionlock add kubernetes

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

netapp trident MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy trident || rpm -q trident || trident --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-11243?

kubernetes: upgrade to newer than 1.12.4; trident: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-11243 being exploited?

CVE-2019-11243 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-11243 affect?

CVE-2019-11243 affects kubernetes, trident. Severity is high (CVSS 8.1). In Kubernetes v1.12.0-v1.12.4 and v1.13.0, the rest.AnonymousClientConfig() method returns a copy of the provided config, with credentials removed (bearer token, username/password, and client certificate/key data). In the affected versions,

How urgent is CVE-2019-11243?

Priority 57/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Software pages

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References

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