CVE-2026-22872Public exploitNetwork attack vector

Cluster privilege escalation via unchecked RawItem scope

Published Jun 1, 2026 · Updated Jun 1, 2026

Authorization bypass in TenantResource RawItems in Capsule before 0.13.0 allows remote authenticated users to create cluster-scoped resources. HandleSection in internal/controllers/resources/processor.go accepts any RawItem kind, assigns a namespace that Kubernetes ignores for cluster-scoped objects, and creates the object with the controller's privileges. Tenant Owner privileges and the default cluster-admin controller binding are required; admission controls can block crafted objects, but successful exploitation breaks tenant isolation and grants cluster-level privileges.

CVSS severity9.1
Critical
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in TenantResource RawItems in Capsule before 0.13.0 allows remote authenticated users to create cluster-scoped resources. HandleSection in internal/controllers/resources/processor.go accepts any RawItem kind, assigns a namespace that Kubernetes ignores for cluster-scoped objects, and creates the object with the controller's privileges. Tenant Owner privileges and the default cluster-admin controller binding are required; admission controls can block crafted objects, but successful exploitation breaks tenant isolation and grants cluster-level privileges.

The record

CVE
CVE-2026-22872
Published
Jun 1, 2026
Updated
Jun 1, 2026
Vendor
Project Capsule
Product
Capsule
Classifications
CWE-863, CWE-20, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.13.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Project Capsule · Capsuleversion=< 0.13.0

Published CVSS scores

6.9GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N/E:P
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-20Improper Input Validation
T1068Exploitation for Privilege Escalation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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