CVE-2026-22872

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 65% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
72(Attend)
EG Risk 72/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity91% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS
35.1%
KEV
Not listed

Published

May 28, 2026

Last Modified

July 22, 2026

Advisory Details (2)

Auto-updated Jun 3, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github.
github Patch Available🟡 PoC Available

TenantResource RawItems Cluster-Scoped Resource Creation Vulnerability · Advisory · projectcapsule/capsule · GitHub

https://github.com/projectcapsule/capsule/security/advisories/GHSA-qjjm-7j9w-pw72
github_release Patch Available

v0.13.0

Patch available: projectcapsule/capsule v0.13.0

https://github.com/projectcapsule/capsule/releases/tag/v0.13.0

Vendor Advisories for CVE-2026-22872(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/projectcapsule/capsule—0.13.0—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 50× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-23 03:06 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
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  1. 2026-07-08 15:15 UTCEPSS rescore
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  20. 2026-06-25 13:49 UTCEPSS rescore
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  22. 2026-06-24 14:05 UTCEPSS rescore
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  24. 2026-06-23 21:33 UTCEPSS rescore
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  26. 2026-06-22 14:25 UTCEPSS rescore
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  28. 2026-06-21 14:56 UTCEPSS rescore
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  44. 2026-06-10 13:22 UTCEPSS rescore
  45. 2026-06-08 14:17 UTCEPSS rescore
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  47. 2026-06-07 15:25 UTCEPSS rescore
  48. 2026-06-07 15:24 UTCEPSS rescore
  49. 2026-06-06 13:47 UTCEPSS rescore
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  53. 2026-06-05 06:10 UTCEPSS rescore
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  55. 2026-06-04 13:12 UTCEPSS rescore
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  57. 2026-06-04 13:12 UTCEPSS rescore
  58. 2026-06-04 00:09 UTCEG score recompute▲ 9.10
  59. 2026-06-02 20:13 UTCEPSS rescore
  60. 2026-06-02 20:13 UTCEPSS rescore
  61. 2026-05-28 17:07 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-22872?
CVE-2026-22872 is a critical vulnerability published on May 28, 2026. 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…
When was CVE-2026-22872 disclosed?
CVE-2026-22872 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-22872 actively exploited?
CVE-2026-22872 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 35.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-22872?
CVE-2026-22872 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-22872?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-22872, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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