CVE-2026-66787— Lighthouse: lighthouse: cross-cluster dns spoofing via unvalidated endpointslice and serviceimport ips
Possible ATT&CK Techniques 3AI
T1530 · Data from Cloud Storage T1040 · Network Sniffing T1557 · Adversary-in-the-MiddleAffected Version Matrix 4
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2 | any | affected |
any | affected | ||
any | affected | ||
any | affected |
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I. Basic Information for CVE-2026-66787
Vulnerability Information
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Vulnerability Title
Lighthouse: lighthouse: cross-cluster dns spoofing via unvalidated endpointslice and serviceimport ips
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
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 | |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2 | - | cpe:/a:redhat:acm:2 | |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2 | - | cpe:/a:redhat:acm:2 | |
| Red Hat | Red Hat Advanced Cluster Management for Kubernetes 2 | - | cpe:/a:redhat:acm:2 |
II. Public POCs for CVE-2026-66787
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|---|
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Vendor Advisories for CVE-2026-66787 (2)
Same Patch Batch · Red Hat · 2026-08-20 · 16 CVEs total
| CVE-2026-67567 | 9.9 CRITICAL | Multicloud-operators-subscription: multicloud-operators-subscription: helmrelease chart ap |
| 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-2026-77176 | 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
- CVE-2026-73137
Multicloud-operators-subscription: multicloud-operators-subs - CVE-2026-67567
Multicloud-operators-subscription: multicloud-operators-subs - CVE-2026-66788
Lighthouse: lighthouse: arbitrary local-namespace injection - CVE-2026-66785
Submariner: submariner: unvalidated endpoint.spec.subnets pr - CVE-2026-76827
Search-indexer: search-indexer: update/delete operations not
Same vendor: Red Hat
- CVE-2026-73267
Clusterclaims-controller: clusterclaims-controller: managedc - CVE-2026-73137
Multicloud-operators-subscription: multicloud-operators-subs - CVE-2026-67567
Multicloud-operators-subscription: multicloud-operators-subs - CVE-2026-66788
Lighthouse: lighthouse: arbitrary local-namespace injection - CVE-2026-66785
Submariner: submariner: unvalidated endpoint.spec.subnets pr
Same weakness: CWE-345
- CVE-2026-62204
SiYuan before v3.7.4 Plugin Overwrite via Bazaar Install - CVE-2026-58002
WWBN AVideo Authorization Bypass via Users_affiliations add. - CVE-2026-53425
Missing InResponseTo validation in Samly allows acceptance o - CVE-2026-44725
EMQX: Stale plugins allow grants amplify a compromised admin - CVE-2026-68554
Coturn: STUN attributes after MESSAGE-INTEGRITY are processe
V. Comments for CVE-2026-66787
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