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CVE-2026-66788 (GCVE-0-2026-66788)

Vulnerability from cvelistv5 – Published: 2026-08-20 18:15 – Updated: 2026-09-03 04:41
VLAI
Title
Lighthouse: dockerfile build stages use end-of-life fedora 40 referenced by mutable tag
Summary
A flaw was found in Lighthouse. A remote attacker, by compromising a spoke cluster, can exploit a vulnerability where the destination namespace for resource injection is derived from an attacker-controlled label or annotation on the broker object. This allows the attacker to inject unauthorized EndpointSlices and ServiceImports into any namespace on peer clusters, including critical system namespaces like kube-system and openshift-*. This could lead to privilege escalation or other forms of system compromise within the cluster.
Severity
3.7 (Low)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 18:52 UTC
CWE
  • CWE-1104 - Use of Unmaintained Third Party Components
Assigner
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:63016 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-66788 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2507533 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version CPE status
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 Unaffected: 1788023916 , < * (rpm)
    cpe:/a:redhat:acm:2.17::el9
Create a notification for this product.
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 Unaffected: 1788023940 , < * (rpm)
    cpe:/a:redhat:acm:2.17::el9
Create a notification for this product.
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 Unaffected: 1788105072 , < * (rpm)
    cpe:/a:redhat:acm:2.17::el9
Create a notification for this product.
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 Unaffected: 1788073481 , < * (rpm)
    cpe:/a:redhat:acm:2.17::el9
Create a notification for this product.
Date Public
2026-08-20 17:20
Show details on NVD website
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.