CVE-2026-66787

CVE.org · Published

Record status: Published
Identifier year (not publication year): 2026
Source publication: Aug 20, 2026
Source updated: Oct 19, 2026
Imported by cveboard: Oct 24, 2026
Source snapshot: cve_2026-10-24_midnight_baseline · Oct 24, 2026

CNA source text (English)

Lighthouse: lighthouse: cross-cluster dns spoofing via unvalidated endpointslice ip addresses

A flaw was found in the lighthouse component of Red Hat Advanced Cluster Management for Kubernetes. This vulnerability stems from insufficient validation of advertised IP addresses within EndpointSlice objects. A compromised spoke cluster can exploit this by creating EndpointSlices with attacker-controlled IP addresses, causing other clusters' lighthouse DNS to redirect legitimate service traffic to malicious endpoints. This enables a remote attacker to conduct transparent Man-in-the-Middle (MITM) attacks on cross-cluster service communications, potentially leading to unauthorized information disclosure and data manipulation.

Scoped product and version facts

Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.

Exploitation unknown; this catalogue does not assess exploitation.

Red Hat Advanced Cluster Management for Kubernetes 2.16

Vendor: Red Hat
Product: Red Hat Advanced Cluster Management for Kubernetes 2.16
Platforms: Unknown
Default status: affected
Package: rhacm2/lighthouse-agent-rhel9
Package collection: https://catalog.redhat.com/software/containers/

Red Hat Advanced Cluster Management for Kubernetes 2.16 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
1790670439	`unaffected`	rpm	*	Unavailable	None listed

Red Hat Advanced Cluster Management for Kubernetes 2.16

Vendor: Red Hat
Product: Red Hat Advanced Cluster Management for Kubernetes 2.16
Platforms: Unknown
Default status: affected
Package: rhacm2/lighthouse-coredns-rhel9
Package collection: https://catalog.redhat.com/software/containers/

Red Hat Advanced Cluster Management for Kubernetes 2.16 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
1790670231	`unaffected`	rpm	*	Unavailable	None listed

Red Hat Advanced Cluster Management for Kubernetes 2.16

Vendor: Red Hat
Product: Red Hat Advanced Cluster Management for Kubernetes 2.16
Platforms: Unknown
Default status: affected
Package: rhacm2/subctl-rhel9
Package collection: https://catalog.redhat.com/software/containers/

Red Hat Advanced Cluster Management for Kubernetes 2.16 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
1790670243	`unaffected`	rpm	*	Unavailable	None listed

Red Hat Advanced Cluster Management for Kubernetes 2.16

Vendor: Red Hat
Product: Red Hat Advanced Cluster Management for Kubernetes 2.16
Platforms: Unknown
Default status: affected
Package: rhacm2/submariner-rhel9-operator
Package collection: https://catalog.redhat.com/software/containers/

Red Hat Advanced Cluster Management for Kubernetes 2.16 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
1790670912	`unaffected`	rpm	*	Unavailable	None listed

Red Hat Advanced Cluster Management for Kubernetes 2.17

Vendor: Red Hat
Product: Red Hat Advanced Cluster Management for Kubernetes 2.17
Platforms: Unknown
Default status: affected
Package: rhacm2/lighthouse-agent-rhel9
Package collection: https://catalog.redhat.com/software/containers/

Red Hat Advanced Cluster Management for Kubernetes 2.17 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
1788023916	`unaffected`	rpm	*	Unavailable	None listed

Red Hat Advanced Cluster Management for Kubernetes 2.17

Vendor: Red Hat
Product: Red Hat Advanced Cluster Management for Kubernetes 2.17
Platforms: Unknown
Default status: affected
Package: rhacm2/lighthouse-coredns-rhel9
Package collection: https://catalog.redhat.com/software/containers/

Red Hat Advanced Cluster Management for Kubernetes 2.17 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
1788023940	`unaffected`	rpm	*	Unavailable	None listed

Red Hat Advanced Cluster Management for Kubernetes 2.17

Vendor: Red Hat
Product: Red Hat Advanced Cluster Management for Kubernetes 2.17
Platforms: Unknown
Default status: affected
Package: rhacm2/subctl-rhel9
Package collection: https://catalog.redhat.com/software/containers/

Red Hat Advanced Cluster Management for Kubernetes 2.17 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
1788105072	`unaffected`	rpm	*	Unavailable	None listed

Red Hat Advanced Cluster Management for Kubernetes 2.17

Vendor: Red Hat
Product: Red Hat Advanced Cluster Management for Kubernetes 2.17
Platforms: Unknown
Default status: affected
Package: rhacm2/submariner-rhel9-operator
Package collection: https://catalog.redhat.com/software/containers/

Red Hat Advanced Cluster Management for Kubernetes 2.17 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
1788073481	`unaffected`	rpm	*	Unavailable	None listed