CVE-2026-54100

HIGHPre-NVD 8.38.3—
EchelonGraph scoreMEDIUM confidence

Score 8.3 from GitHub Security Advisory (severity: HIGH) published 2026-06-22. a secondary CVSS source baseline 8.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.3Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform. WMCO establishes SSH connections to Windows worker nodes without verifying the remote server host key. An adjacent-network attacker who can intercept or redirect WMCO's SSH session can capture WICD and kubelet bootstrap credentials transferred during node configuration, enabling compromise of Windows node identities in the cluster.

CVSS v3
8.3
EG Score
8.3(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
Severity83% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

June 22, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Jun 22, 2026
Patch available. Sources: redhat.
redhat

2487953 – (CVE-2026-54100) CVE-2026-54100 windows-machine-config-operator: windows-machine-config-operator: SSH host key not verified enables credential theft

https://bugzilla.redhat.com/show_bug.cgi?id=2487953
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-54100

Vendor Advisories for CVE-2026-54100(3)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatopenshift4-wincw/windows-machine-config-rhel9-operator:17870657082026-08-31redhat
redhatopenshift4-wincw/windows-machine-config-rhel9-operator:17836928002026-07-28redhat

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(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 89× 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 326 total refreshes for this CVE.

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

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redhat:RHSA-2026:47173

Frequently asked(5)

What is CVE-2026-54100?
CVE-2026-54100 is a high vulnerability published on June 22, 2026. A flaw was found in the Windows Machine Config Operator (WMCO) for Red Hat OpenShift Container Platform. WMCO establishes SSH connections to Windows worker nodes without verifying the remote server host key. An adjacent-network attacker who can intercept or redirect WMCO's SSH session can capture…
When was CVE-2026-54100 disclosed?
CVE-2026-54100 was first published in the National Vulnerability Database on June 22, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54100 actively exploited?
CVE-2026-54100 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 77.2% of all scored CVEs.
What is the CVSS score of CVE-2026-54100?
CVE-2026-54100 has a CVSS v3 base score of 8.3 (NVD).
How do I remediate CVE-2026-54100?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54100, 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.

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