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CVE-2026-67567— Multicloud-operators-subscription: multicloud-operators-subscription: helmrelease chart applied with controller sa without gvk or namespace restriction

Quick assessment

Affected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

发现 multicloud-operators-subscription 组件中存在一个安全缺陷。该漏洞允许拥有创建 HelmRelease 自定义资源（CRs）权限的租户绕过现有的安全控制机制。系统中的 HelmRelease 控制器在使用自身具有较高权限的 ServiceAccount 处理 Helm Chart 模板时，未进行充分的安全验证。这使得租户能够在整个集群中部署任意资源，从而导致严重的安全风险。

CVSS 9.9 · Critical EPSS 0.32% · P25

Affected Version Matrix 1

VendorProduct Version RangeStatus
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 any affected
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I. Basic Information for CVE-2026-67567

Vulnerability Information
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Vulnerability Title
Multicloud-operators-subscription: multicloud-operators-subscription: helmrelease chart applied with controller sa without gvk or namespace restriction
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the multicloud-operators-subscription component. This vulnerability allows a tenant, who has the ability to create HelmRelease custom resources (CRs), to bypass existing security controls. The system's HelmRelease controller processes Helm chart templates using its own elevated ServiceAccount privileges without proper validation. This enables the tenant to deploy arbitrary resources across the entire cluster, leading to a significant security compromise.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未有动机的代理或中间人(混淆代理)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2

II. Public POCs for CVE-2026-67567

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III. Intelligence Information for CVE-2026-67567

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Vendor Advisories for CVE-2026-67567 (2)

Same Patch Batch · Red Hat · 2026-08-20 · 16 CVEs total

CVE-2026-66788 9.9 CRITICAL Lighthouse: lighthouse: arbitrary local-namespace injection via attacker-controlled labels
CVE-2026-66785 9.9 CRITICAL Submariner: submariner: unvalidated endpoint.spec.subnets propagated into wireguard allowe
CVE-2026-11861 9.6 CRITICAL Freeipa: idm: ipa: freeipa: obtaining tgs with impersonating cname through trust relations
CVE-2026-13097 9.1 CRITICAL Ipa: privilege escalation via krbcanonicalname manipulation due to realm-unaware uniquenes
CVE-2026-66787 8.7 HIGH Lighthouse: lighthouse: cross-cluster dns spoofing via unvalidated endpointslice and servi
CVE-2026-77176 8.1 HIGH Kata-containers: insufficient validation of createcontainer mount and storage rules in gen
CVE-2026-18917 7.8 HIGH Libvirt: integer overflow in nodegetfreepages rpc handler leading to heap buffer overflow
CVE-2026-19582 7.8 HIGH Binutils: stack buffer overflow in gnu binutils in rsrc_print_name from an untrusted pe fi
CVE-2026-73137 7.7 HIGH Multicloud-operators-subscription: multicloud-operators-subscription: cross-namespace secr
CVE-2026-73198 7.5 HIGH Ipa: freeipa: unauthenticated dos in `/ipa/i18n_messages` via unbounded request body read
CVE-2026-73197 7.5 HIGH Ipa: freeipa: unauthenticated dos in `/ipa/migration/migration.py` via unbounded request b
CVE-2026-19611 7.4 HIGH Wildfly-elytron: org.wildfly.security/wildfly-elytron-password-impl: wildfly-elytron: pass
CVE-2026-73199 6.5 MEDIUM Ipa: freeipa: null pointer dereference in `ipa-enrollment` extended operation (`join_oid`)
CVE-2026-77014 5.3 MEDIUM Libsoup: libsoup: integer truncation in sort_ranges() comparator causes silent omission of
CVE-2026-73196 4.3 MEDIUM Ipa: freeipa: authenticated dos in `otptoken-add` via unbounded otp key decoding/re-encodi

IV. Related Vulnerabilities

Same product: Red Hat Advanced Cluster Management for Kubernetes 2
Same vendor: Red Hat
Same weakness: CWE-441

V. Comments for CVE-2026-67567

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