CVE-2026-66783

HIGHPre-NVD 4.48.2▲
EchelonGraph scoreMEDIUM confidence

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-08-18. a secondary CVSS source baseline 4.4; sources differ by 3.8.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.4Exploit: None knownExposed: 0

A fix is available — apply it.

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
4.4
EG Score
8.2(medium)
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
20%
KEV
Not listed

Published

August 18, 2026

Last Modified

September 3, 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(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhacm2/submariner-rhel9-operator:17880734812026-09-03redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 36× in last 7d / 136× 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.

Showing the most recent 100 of 148 total refreshes for this CVE.

  1. 2026-09-19 03:44 UTCEG score recompute
  2. 2026-09-19 03:44 UTCVendor advisory
  3. 2026-09-19 03:44 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 14:37 UTCVendor advisory
  6. 2026-09-18 14:37 UTCGHSA enrichment
  7. 2026-09-18 01:29 UTCEG score recompute
  8. 2026-09-18 01:29 UTCVendor advisory
  9. 2026-09-18 01:29 UTCGHSA enrichment
  10. 2026-09-17 12:22 UTCVendor advisory
  11. 2026-09-17 12:22 UTCGHSA enrichment
  12. 2026-09-16 23:15 UTCEG score recompute
  13. 2026-09-16 23:15 UTCVendor advisory
  14. 2026-09-16 23:15 UTCGHSA enrichment
  15. 2026-09-16 14:08 UTCEPSS rescore
  16. 2026-09-16 10:08 UTCEG score recompute
  17. 2026-09-16 10:08 UTCVendor advisory
  18. 2026-09-16 10:08 UTCGHSA enrichment
  19. 2026-09-16 05:15 UTCEPSS rescore
  20. 2026-09-15 19:09 UTCVendor advisory
  21. 2026-09-15 19:09 UTCGHSA enrichment
  22. 2026-09-15 05:53 UTCEG score recompute
  23. 2026-09-15 05:53 UTCVendor advisory
  24. 2026-09-15 05:53 UTCGHSA enrichment
  25. 2026-09-14 15:58 UTCVendor advisory
Show 75 more
  1. 2026-09-14 15:58 UTCGHSA enrichment
  2. 2026-09-14 02:51 UTCEG score recompute
  3. 2026-09-14 02:51 UTCVendor advisory
  4. 2026-09-14 02:51 UTCGHSA enrichment
  5. 2026-09-13 13:45 UTCVendor advisory
  6. 2026-09-13 13:45 UTCGHSA enrichment
  7. 2026-09-13 00:38 UTCEG score recompute
  8. 2026-09-13 00:38 UTCVendor advisory
  9. 2026-09-13 00:38 UTCGHSA enrichment
  10. 2026-09-12 11:30 UTCVendor advisory
  11. 2026-09-12 11:30 UTCGHSA enrichment
  12. 2026-09-11 21:42 UTCEG score recompute
  13. 2026-09-11 21:42 UTCVendor advisory
  14. 2026-09-11 21:42 UTCGHSA enrichment
  15. 2026-09-11 14:53 UTCEPSS rescore
  16. 2026-09-11 08:35 UTCVendor advisory
  17. 2026-09-11 08:35 UTCGHSA enrichment
  18. 2026-09-10 19:28 UTCEG score recompute
  19. 2026-09-10 19:28 UTCVendor advisory
  20. 2026-09-10 19:28 UTCGHSA enrichment
  21. 2026-09-10 06:19 UTCVendor advisory
  22. 2026-09-10 06:19 UTCGHSA enrichment
  23. 2026-09-09 17:12 UTCVendor advisory
  24. 2026-09-09 17:12 UTCGHSA enrichment
  25. 2026-09-09 03:25 UTCEG score recompute
  26. 2026-09-09 03:25 UTCVendor advisory
  27. 2026-09-09 03:25 UTCGHSA enrichment
  28. 2026-09-08 22:01 UTCEPSS rescore
  29. 2026-09-07 23:33 UTCEG score recompute
  30. 2026-09-07 23:33 UTCVendor advisory
  31. 2026-09-07 23:33 UTCGHSA enrichment
  32. 2026-09-07 16:01 UTCEPSS rescore
  33. 2026-09-07 10:25 UTCVendor advisory
  34. 2026-09-07 10:25 UTCGHSA enrichment
  35. 2026-09-06 20:38 UTCEG score recompute
  36. 2026-09-06 20:38 UTCVendor advisory
  37. 2026-09-06 20:38 UTCGHSA enrichment
  38. 2026-09-06 13:47 UTCEPSS rescore
  39. 2026-09-06 07:28 UTCVendor advisory
  40. 2026-09-06 07:28 UTCGHSA enrichment
  41. 2026-09-05 18:19 UTCEG score recompute
  42. 2026-09-05 18:19 UTCVendor advisory
  43. 2026-09-05 18:19 UTCGHSA enrichment
  44. 2026-09-05 15:31 UTCEPSS rescore
  45. 2026-09-05 05:09 UTCVendor advisory
  46. 2026-09-05 05:09 UTCGHSA enrichment
  47. 2026-09-04 16:01 UTCEG score recompute
  48. 2026-09-04 16:01 UTCVendor advisory
  49. 2026-09-04 16:01 UTCGHSA enrichment
  50. 2026-09-04 05:07 UTCEPSS rescore
  51. 2026-09-04 02:55 UTCVendor advisory
  52. 2026-09-04 02:55 UTCGHSA enrichment
  53. 2026-09-03 13:19 UTCEG score recompute
  54. 2026-09-03 13:19 UTCVendor advisory
  55. 2026-09-03 13:18 UTCGHSA enrichment
  56. 2026-09-03 05:01 UTCEG score recompute
  57. 2026-09-03 05:00 UTCGHSA enrichment
  58. 2026-09-02 23:43 UTCEG score recompute
  59. 2026-09-02 23:43 UTCGHSA enrichment
  60. 2026-09-02 14:12 UTCEPSS rescore
  61. 2026-09-02 10:36 UTCGHSA enrichment
  62. 2026-09-01 21:27 UTCEG score recompute
  63. 2026-09-01 21:27 UTCGHSA enrichment
  64. 2026-09-01 21:26 UTCNVD updateCVSS v3 → 4.4 · severity → MEDIUM
  65. 2026-09-01 20:21 UTCGHSA enrichment
  66. 2026-09-01 20:17 UTCNVD update
  67. 2026-09-01 19:35 UTCEG score recompute
  68. 2026-09-01 19:35 UTCGHSA enrichment
  69. 2026-09-01 19:22 UTCMITRE cvelistV5
  70. 2026-09-01 13:54 UTCEPSS rescore
  71. 2026-09-01 12:00 UTCEG score recompute
  72. 2026-09-01 11:59 UTCGHSA enrichment
  73. 2026-09-01 04:40 UTCEPSS rescore
  74. 2026-08-31 22:50 UTCGHSA enrichment
  75. 2026-08-31 09:44 UTCGHSA enrichment

Related CVEs(same vendor + 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 September 3, 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 79.6% of all scored CVEs.
What is the CVSS score of CVE-2026-66783?
CVE-2026-66783 has a CVSS v3 base score of 4.4 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 8.2.
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

Explore →

Is Your Infrastructure Affected by CVE-2026-66783?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs