Capsule TenantResource RawItems Cluster-Scoped Resource Creation Vulnerability

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

6.9 · 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 · score source

EPSS

• CVE-2026-22872: 0.68% estimated exploitation activity in the next 30 days; percentile 52.46 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

TenantResource RawItems Cluster-Scoped Resource Creation Vulnerability Summary 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. 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. --- Details Vulnerability Location File: internal/controllers/resources/processor.go Function: HandleSection() Lines: 247-285 Core Issues 1. Excessive Controller Privileges: The Controller's ServiceAccount is bound to the cluster-admin ClusterRole 2. Missing Resource Scope Validation: Although the code calls obj.SetNamespace(ns.Name), this is ineffective for cluster-scoped resources (ClusterRole, ValidatingWebhookConfiguration, etc.), as the Kubernetes…

Published by the source

28 May 2026, 17:02 UTC

Last modified by the source

9 Jun 2026, 10:50 UTC

Source last checked

26 Oct 2026, 15:23 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-qjjm-7j9w-pw72

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# Patch Next advisory brief: CVE-2026-22872

Advisory: Capsule TenantResource RawItems Cluster-Scoped Resource Creation Vulnerability
IDs: CVE-2026-22872, GHSA-qjjm-7j9w-pw72
Record: https://patchnext.com/advisories/cve-2026-22872 (revision 1, source checked 26 Oct 2026, 15:23 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/projectcapsule/capsule 0.13.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/projectcapsule/capsule: affected < 0.13.0; fixed in 0.13.0

## Suggested inspection (read-only)
- Go github.com/projectcapsule/capsule: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/projectcapsule/capsule.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-qjjm-7j9w-pw72 (GitHub-reviewed advisory GHSA-qjjm-7j9w-pw72 lists affected ranges: Go github.com/projectcapsule/capsule >=0 <0.13.0)

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