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Authoritative vendor disclosure · 2026
CVE-2026-66801High confidence

multicluster-global-hub: Cross-hub lateral movement via shared spec-topic Write ACL and spoofable CloudEvent identity

Red Hat Product Security · registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:53ab458b15b639a3fa185a26995817d05c2379d9757b370a6cf078c9b5519fe8_ppc64le as a component of Multicluster Global Hub 1.4.9

9.9CriticalCVSS 3.1
Recommended action
Within 72 hours

Red Hat Product Security reports a critical vendor CVSS assessment and supplies remediation evidence. Validate product applicability and exposure while canonical CVE data is pending.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityCriticalOperational priority:Critical, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Red Hat Product Security registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:53ab458b15b639a3fa185a26995817d05c2379d9757b370a6cf078c9b5519fe8_ppc64le as a component of Multicluster Global Hub 1.4.9 and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 3 daysRemediation target: Within 90 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2026-66801 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitymulticluster-global-hub: Cross-hub lateral movement via shared spec-topic Write ACL and spoofable CloudEvent identity
20 fixed

The vendor explicitly identifies these products or versions as containing the fix.

  • registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:53ab458b15b639a3fa185a26995817d05c2379d9757b370a6cf078c9b5519fe8_ppc64le as a component of Multicluster Global Hub 1.4.9
  • registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:7c20f24f0cd291831d8857c087fd5332ce0f72e365faece2db881517f594f9d5_amd64 as a component of Multicluster Global Hub 1.4.9
  • registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f29739944614d96575fb1a9e2df3a11fa7bf9fe861b555d6d9092d6eea8f2565_s390x as a component of Multicluster Global Hub 1.4.9
  • registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f9e15fced05d8b4301a11cbddb4e7a04b92db52badf4459771d0ce83ec195dea_arm64 as a component of Multicluster Global Hub 1.4.9
  • registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:54fa72b965dba7dad60263362a95515ca41ca5c5d62621690c025a99a7977a77_s390x as a component of Multicluster Global Hub 1.5.8
  • registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b780e75db2833550d5618c44d63cc374a4a38c8d327e514ef2aa2c8ce8badb95_amd64 as a component of Multicluster Global Hub 1.5.8
  • registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:d4fe193c51324c2cfa286f61c5e0cc10bf4e848c874967af10161a6b8e5bd321_arm64 as a component of Multicluster Global Hub 1.5.8
  • registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:ffa96130ce94a9d9f51cabce8e2e6eac64f01034b596cc7d2b90d33713496ccf_ppc64le as a component of Multicluster Global Hub 1.5.8
  • registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:3683dec0e1995e5f74da731a720f67c74b03fc22f9ee4fde9eae2dfda6e9541b_s390x as a component of Multicluster Global Hub 1.6.6
  • registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:45ee466e62a5c23465c708ef45fe2c382a511d8aab27805b9b59b0a897ea34b8_arm64 as a component of Multicluster Global Hub 1.6.6
  • registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:4e9983ebd37e06969fbc9ecc7a07dfebea6bf1b1a42b5e28678646f2a0466932_ppc64le as a component of Multicluster Global Hub 1.6.6
  • registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:948f18c01dcf6d1525d7eab475bea09396969d8c3269ff5b5f449c6ef78928a5_amd64 as a component of Multicluster Global Hub 1.6.6
Summary
A flaw was found in multicluster-global-hub. An attacker who compromises a managed hub can leverage its legitimate Kafka client certificate to publish a CloudEvent (a specification for describing event data in a common way) message to the shared `gh-spec` topic. This message can spoof its source as "global-hub" and target other managed hubs. Due to a lack of binding between the Kafka client principal and the CloudEvent envelope, the agent on the targeted hub accepts this spoofed message and applies arbitrary resources. This vulnerability allows for fleet-wide cluster-admin privilege escalation across all managed hubs.
Remediation
For more details, see the Red Hat Advanced Cluster Management for Kubernetes documentation: https://docs.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.13/html/multicluster_global_hub/index
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Recommended actionWithin 72 hours

Red Hat Product Security reports a critical vendor CVSS assessment and supplies remediation evidence. Validate product applicability and exposure while canonical CVE data is pending.

Patch available
01

What, why and how

A flaw was found in multicluster-global-hub. An attacker who compromises a managed hub can leverage its legitimate Kafka client certificate to publish a CloudEvent (a specification for describing event data in a common way) message to the shared `gh-spec` topic. This message can spoof its source as "global-hub" and target other managed hubs. Due to a lack of binding between the Kafka client principal and the CloudEvent envelope, the agent on the targeted hub accepts this spoofed message and applies arbitrary resources. This vulnerability allows for fleet-wide cluster-admin privilege escalation across all managed hubs.

What

A flaw was found in multicluster-global-hub. An attacker who compromises a managed hub can leverage its legitimate Kafka client certificate to publish a CloudEvent (a specification for describing event data in a common way) message to the shared `gh-spec` topic. This message can spoof its source as "global-hub" and target other managed hubs. Due to a lack of binding between the Kafka client principal and the CloudEvent envelope, the agent on the targeted hub accepts this spoofed message and applies arbitrary resources. This vulnerability allows for fleet-wide cluster-admin privilege escalation across all managed hubs.

Why

This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may gain additional privileges.

What

A flaw was found in multicluster-global-hub. An attacker who compromises a managed hub can leverage its legitimate Kafka client certificate to publish a CloudEvent (a specification for describing event data in a common way) message to the shared `gh-spec` topic. This message can spoof its source as "global-hub" and target other managed hubs. Due to a lack of binding between the Kafka client principal and the CloudEvent envelope, the agent on the targeted hub accepts this spoofed message and applies arbitrary resources. This vulnerability allows for fleet-wide cluster-admin privilege escalation across all managed hubs.

Why

This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may gain additional privileges.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Authentication Bypass by Spoofing → gain additional privileges
Attack surface
Network
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Changed: exploitation can affect a different security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-290 ↗

CWE-290: Authentication Bypass by Spoofing. This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SChangedScope: The attack can affect a component governed by a different security authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkPrivilege escalationCWE-290
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
The vendor advisory identifies this CVE but does not provide a concise affected-product range.
Fixed
Action
For more details, see the Red Hat Advanced Cluster Management for Kubernetes documentation: https://docs.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.13/html/multicluster_global_hub/index
Workaround
No separate vendor workaround is recorded. Follow the linked advisory and validate the exact affected product and release.
Official vendor articles1 stored document

Linked articles are downloaded and versioned as source evidence. A CVE mention or approved update relationship does not, by itself, verify a fix for every product branch.

  • CVE-2026-66801 - Red Hat Customer Portal →Original publisher ↗Searchable text snapshot · Captured 27 Sep 2026CVE-2026-66801 Description A flaw was found in multicluster-global-hub. An attacker who compromises a managed hub can leverage its legitimate Kafka client certificate to publish a CloudEvent (a specification for describing event data in a common way) message to the shared gh-spec topic. This message can spoof its sourc
04

Evidence and provenance

Published 10 Aug 2026 · Last source change 29 Sept 2026, 19:41 UTC · CWE-290 · Authentication Bypass by Spoofing

CVE recordRed Hat Product Security · OASIS CSAF 2.0
CVSS sourceOther authority
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
Unavailable
European sourceNo official EUVD mapping
Product sourceAuthoritative vendor CSAF advisory
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD status unavailable

Missing structured fields: official CVE record, canonical affected-version range. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    The vendor advisory identifies this CVE but does not provide a concise affected-product range. · Fixed: registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:53ab458b15b639a3fa185a26995817d05c2379d9757b370a6cf078c9b5519fe8_ppc64le as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:7c20f24f0cd291831d8857c087fd5332ce0f72e365faece2db881517f594f9d5_amd64 as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f29739944614d96575fb1a9e2df3a11fa7bf9fe861b555d6d9092d6eea8f2565_s390x as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f9e15fced05d8b4301a11cbddb4e7a04b92db52badf4459771d0ce83ec195dea_arm64 as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:54fa72b965dba7dad60263362a95515ca41ca5c5d62621690c025a99a7977a77_s390x as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b780e75db2833550d5618c44d63cc374a4a38c8d327e514ef2aa2c8ce8badb95_amd64 as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:d4fe193c51324c2cfa286f61c5e0cc10bf4e848c874967af10161a6b8e5bd321_arm64 as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:ffa96130ce94a9d9f51cabce8e2e6eac64f01034b596cc7d2b90d33713496ccf_ppc64le as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:3683dec0e1995e5f74da731a720f67c74b03fc22f9ee4fde9eae2dfda6e9541b_s390x as a component of Multicluster Global Hub 1.6.6; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:45ee466e62a5c23465c708ef45fe2c382a511d8aab27805b9b59b0a897ea34b8_arm64 as a component of Multicluster Global Hub 1.6.6; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:4e9983ebd37e06969fbc9ecc7a07dfebea6bf1b1a42b5e28678646f2a0466932_ppc64le as a component of Multicluster Global Hub 1.6.6; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:948f18c01dcf6d1525d7eab475bea09396969d8c3269ff5b5f449c6ef78928a5_amd64 as a component of Multicluster Global Hub 1.6.6; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:4ab4a0d1ea1f0bd6e61b7a202311960129e84cb36a8922305a661a76ea8c49f7_s390x as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:5cf6ec50135435f6626f10c57a11c76af61c5f278c04bcfaf992f3621db88005_amd64 as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:af5d0180164c9cfef7a111f0d27b4ab6b5d81e2caaa1a696958c02291f006184_arm64 as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b8e58493087705e33afe23d72ed351608c6f6ac22c304be09d279b71ce98a815_ppc64le as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:068e16c4575f853f8a292bc3f34d50ee0fdb76e410d5e6a273399d5e7533ec31_ppc64le as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:351c748dd43ee596b8565f4742569fec5dd6c41f6c0646f4b58ab1ee4bc8b603_amd64 as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b421850439207c883866768499822794db6c04a473f8fa80d553e3b35e595e33_arm64 as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f1f58a76e9278fbe234cf6ca99383a96fabd716186d9f1908080b4532ce3c7fb_s390x as a component of Multicluster Global Hub 1.8.2
    After
    The vendor advisory identifies this CVE but does not provide a concise affected-product range. · Fixed: For more details, see the Red Hat Advanced Cluster Management for Kubernetes documentation: https://docs.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.13/html/multicluster_global_hub/index
    Red Hat Product Security ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    The vendor advisory identifies this CVE but does not provide a concise affected-product range. · Fixed: For more details, see the Red Hat Advanced Cluster Management for Kubernetes documentation: https://docs.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.13/html/multicluster_global_hub/index
    After
    The vendor advisory identifies this CVE but does not provide a concise affected-product range. · Fixed: registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:53ab458b15b639a3fa185a26995817d05c2379d9757b370a6cf078c9b5519fe8_ppc64le as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:7c20f24f0cd291831d8857c087fd5332ce0f72e365faece2db881517f594f9d5_amd64 as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f29739944614d96575fb1a9e2df3a11fa7bf9fe861b555d6d9092d6eea8f2565_s390x as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f9e15fced05d8b4301a11cbddb4e7a04b92db52badf4459771d0ce83ec195dea_arm64 as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:54fa72b965dba7dad60263362a95515ca41ca5c5d62621690c025a99a7977a77_s390x as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b780e75db2833550d5618c44d63cc374a4a38c8d327e514ef2aa2c8ce8badb95_amd64 as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:d4fe193c51324c2cfa286f61c5e0cc10bf4e848c874967af10161a6b8e5bd321_arm64 as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:ffa96130ce94a9d9f51cabce8e2e6eac64f01034b596cc7d2b90d33713496ccf_ppc64le as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:3683dec0e1995e5f74da731a720f67c74b03fc22f9ee4fde9eae2dfda6e9541b_s390x as a component of Multicluster Global Hub 1.6.6; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:45ee466e62a5c23465c708ef45fe2c382a511d8aab27805b9b59b0a897ea34b8_arm64 as a component of Multicluster Global Hub 1.6.6; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:4e9983ebd37e06969fbc9ecc7a07dfebea6bf1b1a42b5e28678646f2a0466932_ppc64le as a component of Multicluster Global Hub 1.6.6; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:948f18c01dcf6d1525d7eab475bea09396969d8c3269ff5b5f449c6ef78928a5_amd64 as a component of Multicluster Global Hub 1.6.6; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:4ab4a0d1ea1f0bd6e61b7a202311960129e84cb36a8922305a661a76ea8c49f7_s390x as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:5cf6ec50135435f6626f10c57a11c76af61c5f278c04bcfaf992f3621db88005_amd64 as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:af5d0180164c9cfef7a111f0d27b4ab6b5d81e2caaa1a696958c02291f006184_arm64 as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b8e58493087705e33afe23d72ed351608c6f6ac22c304be09d279b71ce98a815_ppc64le as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:068e16c4575f853f8a292bc3f34d50ee0fdb76e410d5e6a273399d5e7533ec31_ppc64le as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:351c748dd43ee596b8565f4742569fec5dd6c41f6c0646f4b58ab1ee4bc8b603_amd64 as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b421850439207c883866768499822794db6c04a473f8fa80d553e3b35e595e33_arm64 as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f1f58a76e9278fbe234cf6ca99383a96fabd716186d9f1908080b4532ce3c7fb_s390x as a component of Multicluster Global Hub 1.8.2
    Authoritative vendor CSAF advisory ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    Fixed: registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:53ab458b15b639a3fa185a26995817d05c2379d9757b370a6cf078c9b5519fe8_ppc64le as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:7c20f24f0cd291831d8857c087fd5332ce0f72e365faece2db881517f594f9d5_amd64 as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f29739944614d96575fb1a9e2df3a11fa7bf9fe861b555d6d9092d6eea8f2565_s390x as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f9e15fced05d8b4301a11cbddb4e7a04b92db52badf4459771d0ce83ec195dea_arm64 as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:54fa72b965dba7dad60263362a95515ca41ca5c5d62621690c025a99a7977a77_s390x as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b780e75db2833550d5618c44d63cc374a4a38c8d327e514ef2aa2c8ce8badb95_amd64 as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:d4fe193c51324c2cfa286f61c5e0cc10bf4e848c874967af10161a6b8e5bd321_arm64 as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:ffa96130ce94a9d9f51cabce8e2e6eac64f01034b596cc7d2b90d33713496ccf_ppc64le as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:3683dec0e1995e5f74da731a720f67c74b03fc22f9ee4fde9eae2dfda6e9541b_s390x as a component of Multicluster Global Hub 1.6.5; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:45ee466e62a5c23465c708ef45fe2c382a511d8aab27805b9b59b0a897ea34b8_arm64 as a component of Multicluster Global Hub 1.6.5; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:4e9983ebd37e06969fbc9ecc7a07dfebea6bf1b1a42b5e28678646f2a0466932_ppc64le as a component of Multicluster Global Hub 1.6.5; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:948f18c01dcf6d1525d7eab475bea09396969d8c3269ff5b5f449c6ef78928a5_amd64 as a component of Multicluster Global Hub 1.6.5; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:4ab4a0d1ea1f0bd6e61b7a202311960129e84cb36a8922305a661a76ea8c49f7_s390x as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:5cf6ec50135435f6626f10c57a11c76af61c5f278c04bcfaf992f3621db88005_amd64 as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:af5d0180164c9cfef7a111f0d27b4ab6b5d81e2caaa1a696958c02291f006184_arm64 as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b8e58493087705e33afe23d72ed351608c6f6ac22c304be09d279b71ce98a815_ppc64le as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:068e16c4575f853f8a292bc3f34d50ee0fdb76e410d5e6a273399d5e7533ec31_ppc64le as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:351c748dd43ee596b8565f4742569fec5dd6c41f6c0646f4b58ab1ee4bc8b603_amd64 as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b421850439207c883866768499822794db6c04a473f8fa80d553e3b35e595e33_arm64 as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f1f58a76e9278fbe234cf6ca99383a96fabd716186d9f1908080b4532ce3c7fb_s390x as a component of Multicluster Global Hub 1.8.2
    After
    Fixed: registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:53ab458b15b639a3fa185a26995817d05c2379d9757b370a6cf078c9b5519fe8_ppc64le as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:7c20f24f0cd291831d8857c087fd5332ce0f72e365faece2db881517f594f9d5_amd64 as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f29739944614d96575fb1a9e2df3a11fa7bf9fe861b555d6d9092d6eea8f2565_s390x as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f9e15fced05d8b4301a11cbddb4e7a04b92db52badf4459771d0ce83ec195dea_arm64 as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:54fa72b965dba7dad60263362a95515ca41ca5c5d62621690c025a99a7977a77_s390x as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b780e75db2833550d5618c44d63cc374a4a38c8d327e514ef2aa2c8ce8badb95_amd64 as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:d4fe193c51324c2cfa286f61c5e0cc10bf4e848c874967af10161a6b8e5bd321_arm64 as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:ffa96130ce94a9d9f51cabce8e2e6eac64f01034b596cc7d2b90d33713496ccf_ppc64le as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:3683dec0e1995e5f74da731a720f67c74b03fc22f9ee4fde9eae2dfda6e9541b_s390x as a component of Multicluster Global Hub 1.6.6; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:45ee466e62a5c23465c708ef45fe2c382a511d8aab27805b9b59b0a897ea34b8_arm64 as a component of Multicluster Global Hub 1.6.6; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:4e9983ebd37e06969fbc9ecc7a07dfebea6bf1b1a42b5e28678646f2a0466932_ppc64le as a component of Multicluster Global Hub 1.6.6; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:948f18c01dcf6d1525d7eab475bea09396969d8c3269ff5b5f449c6ef78928a5_amd64 as a component of Multicluster Global Hub 1.6.6; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:4ab4a0d1ea1f0bd6e61b7a202311960129e84cb36a8922305a661a76ea8c49f7_s390x as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:5cf6ec50135435f6626f10c57a11c76af61c5f278c04bcfaf992f3621db88005_amd64 as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:af5d0180164c9cfef7a111f0d27b4ab6b5d81e2caaa1a696958c02291f006184_arm64 as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b8e58493087705e33afe23d72ed351608c6f6ac22c304be09d279b71ce98a815_ppc64le as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:068e16c4575f853f8a292bc3f34d50ee0fdb76e410d5e6a273399d5e7533ec31_ppc64le as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:351c748dd43ee596b8565f4742569fec5dd6c41f6c0646f4b58ab1ee4bc8b603_amd64 as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b421850439207c883866768499822794db6c04a473f8fa80d553e3b35e595e33_arm64 as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f1f58a76e9278fbe234cf6ca99383a96fabd716186d9f1908080b4532ce3c7fb_s390x as a component of Multicluster Global Hub 1.8.2
    Red Hat Product Security ↗
  4. Affected versionsThe structured affected or fixed version information changed.
    Before
    The vendor advisory identifies this CVE but does not provide a concise affected-product range. · Fixed: registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:53ab458b15b639a3fa185a26995817d05c2379d9757b370a6cf078c9b5519fe8_ppc64le as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:7c20f24f0cd291831d8857c087fd5332ce0f72e365faece2db881517f594f9d5_amd64 as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f29739944614d96575fb1a9e2df3a11fa7bf9fe861b555d6d9092d6eea8f2565_s390x as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f9e15fced05d8b4301a11cbddb4e7a04b92db52badf4459771d0ce83ec195dea_arm64 as a component of Multicluster Global Hub 1.4.9; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:54fa72b965dba7dad60263362a95515ca41ca5c5d62621690c025a99a7977a77_s390x as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b780e75db2833550d5618c44d63cc374a4a38c8d327e514ef2aa2c8ce8badb95_amd64 as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:d4fe193c51324c2cfa286f61c5e0cc10bf4e848c874967af10161a6b8e5bd321_arm64 as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:ffa96130ce94a9d9f51cabce8e2e6eac64f01034b596cc7d2b90d33713496ccf_ppc64le as a component of Multicluster Global Hub 1.5.8; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:3683dec0e1995e5f74da731a720f67c74b03fc22f9ee4fde9eae2dfda6e9541b_s390x as a component of Multicluster Global Hub 1.6.5; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:45ee466e62a5c23465c708ef45fe2c382a511d8aab27805b9b59b0a897ea34b8_arm64 as a component of Multicluster Global Hub 1.6.5; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:4e9983ebd37e06969fbc9ecc7a07dfebea6bf1b1a42b5e28678646f2a0466932_ppc64le as a component of Multicluster Global Hub 1.6.5; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:948f18c01dcf6d1525d7eab475bea09396969d8c3269ff5b5f449c6ef78928a5_amd64 as a component of Multicluster Global Hub 1.6.5; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:4ab4a0d1ea1f0bd6e61b7a202311960129e84cb36a8922305a661a76ea8c49f7_s390x as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:5cf6ec50135435f6626f10c57a11c76af61c5f278c04bcfaf992f3621db88005_amd64 as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:af5d0180164c9cfef7a111f0d27b4ab6b5d81e2caaa1a696958c02291f006184_arm64 as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b8e58493087705e33afe23d72ed351608c6f6ac22c304be09d279b71ce98a815_ppc64le as a component of Multicluster Global Hub 1.7.3; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:068e16c4575f853f8a292bc3f34d50ee0fdb76e410d5e6a273399d5e7533ec31_ppc64le as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:351c748dd43ee596b8565f4742569fec5dd6c41f6c0646f4b58ab1ee4bc8b603_amd64 as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:b421850439207c883866768499822794db6c04a473f8fa80d553e3b35e595e33_arm64 as a component of Multicluster Global Hub 1.8.2; registry.redhat.io/multicluster-globalhub/multicluster-globalhub-rhel9-operator@sha256:f1f58a76e9278fbe234cf6ca99383a96fabd716186d9f1908080b4532ce3c7fb_s390x as a component of Multicluster Global Hub 1.8.2
    After
    The vendor advisory identifies this CVE but does not provide a concise affected-product range. · Fixed: For more details, see the Red Hat Advanced Cluster Management for Kubernetes documentation: https://docs.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.13/html/multicluster_global_hub/index
    Red Hat Product Security ↗
  5. Catalogue recordCVE added to the BlackTree catalogue.
    Authoritative vendor CSAF advisory ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
Vendor disclosed CVE identifier
Vendor remediation published
Fixed release recorded from official guidance
Red Hat Product Security security advisory↗Verified CSAF source data↗CVE.org publication pending↗NVD enrichment pending↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-66801 · cve.blacktree.nl