CVE-2026-22872 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-22872MEDIUM

projectcapsule capsule — Capsule TenantResource RawItems Cluster-Scoped Resource Creation Vulnerability

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   H   N   N   H   N    6.9   .0043   36.0     —

AFFECTED
  Product  Versions    Fixed
  capsule  < 0.13.0 –  —

TIMELINE
  Jan 12  Reserved by GitHub_M
  Jun 1   EXPLOIT PUBLISHED — CVE-2026-22872 (projectcapsule capsule). Public exploit reference added.
  Jun 1   Published (CNA: GitHub_M)

CWE-20, CWE-863 · CNA: GitHub_M · CVSS v4.0 · 2 references · NVD status: Analyzed

Description

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) that they cannot create directly, achieving cross-tenant privilege escalation and cluster-level attacks. The attack vector has a few limiting factors. This attack requires Tenant Owner privileges and requires Capsule Controller running with cluster-admin privileges (default configuration). Additionally, some clusters may have additional admission controllers blocking malicious resources. Version 0.13.0 patches this issue.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
January 12, 2026	Reserved	Reserved by GitHub_M
June 1, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-22872 (projectcapsule capsule). Public exploit reference added.
June 1, 2026	Published	Published (CNA: GitHub_M)

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
projectcapsule	capsule	—	< 0.13.0	—

Weaknesses

CWE-20 · CWE-863

References (2)

https://github.com/projectcapsule/capsule/releases/tag/v0.13.0 [Product, Release Notes]
https://github.com/projectcapsule/capsule/security/advisories/GHSA-qjjm-7j9w-pw72 [Exploit, Vendor Advisory]

Authoritative record: CVE-2026-22872 at cve.org

Vendors: projectcapsule

Weaknesses: CWE-20 · CWE-863

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-22872 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.