CVE-2023-27484: crossplane-runtime is a set of go libraries used to build Kubernetes controllers in Crossplane and its related

This month

MEDIUM 6.2WATCHLISTUPGRADE

CVE-2023-27484 is a medium-severity flaw (CVSS 6.2) affecting crossplane. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

crossplane-runtime is a set of go libraries used to build Kubernetes controllers in Crossplane and its related stacks. In affected versions an already highly privileged user able to create or update Compositions can specify an arbitrarily high index in a patch's `ToFieldPath`, which could lead to excessive memory usage once such Composition is selected for a Composite resource. Compositions allow users to specify patches inserting elements into a

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.2 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-20, CWE-400
Published	2023-03-09
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: crossplane

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

Am I affected?

Timeline

2023-03-09 21:15 UTCPublished CVE record published
2026-06-17 05:45 UTCUpdated Record last modified

crossplane crossplane UPGRADE

Affected: >= 1.9.0 and < 1.9.2 · >= 1.10.0 and < 1.10.3 · >= 1.11.0 and < 1.11.2

Fixed in: 1.9.2, 1.10.3, 1.11.2

Safe to downgrade to: a release before 1.9.0

1. Check installed version

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

2. UPGRADE to 1.9.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade crossplane

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 1.9.0 (Debian / Ubuntu)

apt-cache madison crossplane sudo apt install crossplane=<VERSION_BEFORE_1.9.0> sudo apt-mark hold crossplane

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

dnf --showduplicates list crossplane sudo dnf downgrade crossplane-<VERSION_BEFORE_1.9.0> sudo dnf versionlock add crossplane

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.

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-2023-27484?

crossplane: upgrade to 1.9.2, 1.10.3, 1.11.2. Exact commands for each OS are on this page.

Is CVE-2023-27484 being exploited?

CVE-2023-27484 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-2023-27484 affect?

CVE-2023-27484 affects crossplane. Severity is medium (CVSS 6.2). crossplane-runtime is a set of go libraries used to build Kubernetes controllers in Crossplane and its related stacks. In affected versions an already highly privileged user able to create or update Compositions can specify an arbitrarily h

How urgent is CVE-2023-27484?

Priority 40/100. On your watchlist

Software pages

Kubernetes vulnerabilities

Related CVEs

CVE-2023-38495 HIGH 8.3 UPGRADE Crossplane is a framework for building cloud native control planes without needing to write code
CVE-2023-37900 LOW 3.4 UPGRADE Crossplane is a framework for building cloud native control planes without needing to write code

References

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