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CVE-2026-66787— Lighthouse: go pprof profiling endpoint enabled unconditionally on lighthouse-agent :8082

Quick assessment

Affected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17
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.

Google Lighthouse是美国Google公司的一款网页质量审计与性能评测工具。 Google Lighthouse存在输入验证错误漏洞，该漏洞源于lighthouse组件对EndpointSlice对象中公布的IP地址验证不足，可能导致远程攻击者利用受破坏的spoke集群创建恶意EndpointSlice，将合法服务流量重定向至恶意端点，从而实施中间人攻击，造成未经授权的信息泄露和数据篡改。

CVSS 5.4 · Medium EPSS 0.35% · P27

Affected Version Matrix 4

VendorProduct Version RangeStatus
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1788023916< * unaffected
1788023940< * unaffected
1788105072< * unaffected
1788073481< * unaffected
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I. Basic Information for CVE-2026-66787

Vulnerability Information
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Vulnerability Title
Lighthouse: go pprof profiling endpoint enabled unconditionally on lighthouse-agent :8082
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:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
遗留的调试代码
Source: CVE Program / CVE List V5
Vulnerability Title
Google Lighthouse 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Lighthouse是美国Google公司的一款网页质量审计与性能评测工具。 Google Lighthouse存在输入验证错误漏洞，该漏洞源于lighthouse组件对EndpointSlice对象中公布的IP地址验证不足，可能导致远程攻击者利用受破坏的spoke集群创建恶意EndpointSlice，将合法服务流量重定向至恶意端点，从而实施中间人攻击，造成未经授权的信息泄露和数据篡改。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1788023916 ~ * cpe:/a:redhat:acm:2.17::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1788023940 ~ * cpe:/a:redhat:acm:2.17::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1788105072 ~ * cpe:/a:redhat:acm:2.17::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1788073481 ~ * cpe:/a:redhat:acm:2.17::el9

II. Public POCs for CVE-2026-66787

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III. Intelligence Information for CVE-2026-66787

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Vendor Advisories for CVE-2026-66787 (3)

Same Patch Batch · Red Hat · 2026-08-20 · 15 CVEs total

CVE-2026-67567 9.9 CRITICAL Multicloud-operators-subscription: multicloud-operators-subscription: helmrelease chart ap
CVE-2026-11861 9.6 CRITICAL Freeipa: idm: ipa: freeipa: obtaining tgs with impersonating cname through trust relations
CVE-2026-13097 8.7 HIGH 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-2026-73137 7.7 HIGH Multicloud-operators-subscription: multicloud-operators-subscription: cross-namespace secr
CVE-2026-73197 7.5 HIGH Ipa: freeipa: unauthenticated dos in `/ipa/migration/migration.py` via unbounded request b
CVE-2026-73198 7.5 HIGH Ipa: freeipa: unauthenticated dos in `/ipa/i18n_messages` via unbounded request body read
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
CVE-2026-66788 3.7 LOW Lighthouse: dockerfile build stages use end-of-life fedora 40 referenced by mutable tag
CVE-2026-66785 2.5 LOW Submariner: ipsec psk secrets file created with default world-readable permissions

IV. Related Vulnerabilities

Same product: Red Hat Advanced Cluster Management for Kubernetes 2.17
Same vendor: Red Hat
Same weakness: CWE-489

V. Comments for CVE-2026-66787

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