CVE-2026-66783

HIGHPre-NVD 8.28.2—
EchelonGraph scoreHIGH confidence

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-08-18. a secondary CVSS source baseline 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.2Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A flaw was found in the submariner-operator component of Red Hat Advanced Cluster Management for Kubernetes. This vulnerability allows a cluster administrator, or any user with permissions to modify the Submariner Custom Resource (CR), to specify an unvalidated image path. This lack of validation enables an attacker to execute arbitrary code with elevated privileges across the entire cluster, including control-plane nodes, by deploying a malicious image.

CVSS v3
8.2
EG Score
8.2(high)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity82% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 18, 2026

Last Modified

August 20, 2026

Advisory Details (2)

Auto-updated Aug 18, 2026
Patch available. Sources: redhat.
redhat

2507528 – (CVE-2026-66783) CVE-2026-66783 submariner-operator: submariner-operator: arbitrary image override enables privileged code execution on every node

https://bugzilla.redhat.com/show_bug.cgi?id=2507528
redhat Patch Available

CVE-2026-66783 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-66783

Vendor Advisories for CVE-2026-66783(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 16× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 03:03 UTCEG score recompute
  2. 2026-08-21 03:03 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 13:56 UTCGHSA enrichment
  5. 2026-08-20 04:32 UTCEG score recompute
  6. 2026-08-20 04:32 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 15:25 UTCEG score recompute
  9. 2026-08-19 15:25 UTCGHSA enrichment
  10. 2026-08-19 15:09 UTCEG score recompute
  11. 2026-08-19 15:09 UTCGHSA enrichment
  12. 2026-08-19 06:27 UTCEG score recompute
  13. 2026-08-19 06:27 UTCGHSA enrichment
  14. 2026-08-18 17:21 UTCEG score recompute
  15. 2026-08-18 17:16 UTCEG score recompute
  16. 2026-08-18 17:14 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-66783?
CVE-2026-66783 is a high vulnerability published on August 18, 2026. A flaw was found in the submariner-operator component of Red Hat Advanced Cluster Management for Kubernetes. This vulnerability allows a cluster administrator, or any user with permissions to modify the Submariner Custom Resource (CR), to specify an unvalidated image path. This lack of validation…
When was CVE-2026-66783 disclosed?
CVE-2026-66783 was first published in the National Vulnerability Database on August 18, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-66783 actively exploited?
CVE-2026-66783 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 96.6% of all scored CVEs.
What is the CVSS score of CVE-2026-66783?
CVE-2026-66783 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-66783?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-66783, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-66783

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