CVE-2026-22872: Capsule is a multi-tenancy and policy-based framework for Kubernetes

Q: How do I fix CVE-2026-22872?

capsule: upgrade to 0.13.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-22872 being exploited?

CVE-2026-22872 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-22872 affect?

CVE-2026-22872 affects capsule. Severity is critical (CVSS 9.1). Capsule is a multi-tenancy and policy-based framework for Kubernetes. The Capsule Controller runs with cluster-admin privileges. Although the TenantResource RawItems processing logic forcibly sets the namespace, this is ineffective for clus

Q: How urgent is CVE-2026-22872?

Priority 55/100. Critical severity; Public exploit reference; On your watchlist

This month

CRITICAL 9.1WATCHLISTUPGRADE

CVE-2026-22872 is a critical-severity flaw (CVSS 9.1) affecting capsule. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Capsule is a multi-tenancy and policy-based framework for Kubernetes. The Capsule Controller runs with cluster-admin privileges. Although the TenantResource RawItems processing logic forcibly sets the namespace, this is ineffective for cluster-scoped resources. Prior to version 0.13.0, tenant administrators can leverage the Controller's elevated privileges to create cluster-scoped resources (such as ClusterRole and ValidatingWebhookConfiguration)

Why this priority

Critical severity
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-20, CWE-863
Published	2026-06-01
Last modified	2026-07-22

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

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-01 19:16 UTCPublished CVE record published
2026-07-22 07:10 UTCUpdated Record last modified

projectcapsule capsule UPGRADE

Affected: < 0.13.0

Fixed in: 0.13.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 0.13.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade capsule

Note

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

Exact fixes by distribution

Go · github.com/projectcapsule/capsule · FIXED · 0.13.0 · vulnerable: < 0.13.0 · source

go get github.com/projectcapsule/capsule@v0.13.0 go list -m github.com/projectcapsule/capsule

Fedora 46 · arm-none-eabi-binutils-cs · FIXED · 2.47-1.fc46 · FEDORA-2026-7498616952 · source

sudo dnf upgrade --advisory=FEDORA-2026-7498616952

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/projectcapsule/capsule/security/advisories/GHSA-qjjm-7j9w-pw72

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-2026-22872?

capsule: upgrade to 0.13.0. Exact commands for each OS are on this page.

Is CVE-2026-22872 being exploited?

CVE-2026-22872 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-2026-22872 affect?

CVE-2026-22872 affects capsule. Severity is critical (CVSS 9.1). Capsule is a multi-tenancy and policy-based framework for Kubernetes. The Capsule Controller runs with cluster-admin privileges. Although the TenantResource RawItems processing logic forcibly sets the namespace, this is ineffective for clus

How urgent is CVE-2026-22872?

Priority 55/100. Critical severity; Public exploit reference; On your watchlist

Software pages

Kubernetes vulnerabilities

Related CVEs

CVE-2026-30963 LOW 3.9 UPGRADE Capsule is a multi-tenancy and policy-based framework for Kubernetes

References

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