PT-2026-44721 · Capsule · Capsule

B0B0Haha · Published 2026-05-28 · Updated 2026-06-01 · CVE-2026-22872

Positive Technologies (AI Summary)

CVSS v4.0

8.2

High

Base vector

AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

Name of the Vulnerable Software and Affected Versions Capsule versions prior to 0.13.0

Description The Capsule Controller runs with cluster-admin privileges. A flaw exists in the HandleSection() function within the internal/controllers/resources/processor.go file, where the processing logic for TenantResource RawItems fails to properly validate resource scopes. While the controller attempts to set a namespace using obj.SetNamespace(), this action is ignored by the Kubernetes API for cluster-scoped resources. Consequently, users with Tenant Owner privileges can leverage the controller's elevated permissions to create cluster-scoped resources, such as ClusterRole and ValidatingWebhookConfiguration, which they are not authorized to create directly. This can lead to cross-tenant privilege escalation, cluster-level attacks, theft of sensitive data from all tenants via malicious webhooks, or cluster-wide denial of service.

Recommendations Update to version 0.13.0. As a temporary workaround, restrict the permissions of the Capsule Controller's ServiceAccount to remove cluster-admin privileges if not strictly required.

Fix

RCE

Incorrect Authorization

Weakness Enumeration

CWE-20

CWE-863

Related Identifiers

CVE-2026-22872

GHSA-QJJM-7J9W-PW72

Affected Products

Capsule

References · 5

• https://osv.dev/vulnerability/GHSA-qjjm-7j9w-pw72 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-22872 · Security Note
• https://github.com/projectcapsule/capsule/security/advisories/GHSA-qjjm-7j9w-pw72 · Note
• https://github.com/projectcapsule/capsule · Note
• https://github.com/projectcapsule/capsule/releases/tag/v0.13.0 · Note