CVE-2026-54099

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-22. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: 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. The WICD CSR auto-approver validates that a Certificate Signing Request contains the organization system:wicd-nodes but does not reject additional organization values such as system:masters. A compromised Windows worker node that holds WICD credentials can submit a CSR that is auto-approved and signed by the cluster, yielding a client certificate that grants cluster-administrator privileges and enabling full cluster takeover.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
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

2487950 – (CVE-2026-54099) CVE-2026-54099 windows-machine-config-operator: windows-machine-config-operator: WICD CSR extra-Organization allows privilege escalation to system:masters

https://bugzilla.redhat.com/show_bug.cgi?id=2487950
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-54099

Vendor Advisories for CVE-2026-54099(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 / 84× 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 289 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 11:24 UTCEG score recompute
  4. 2026-09-18 11:24 UTCVendor advisory
  5. 2026-09-18 11:24 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 13:40 UTCEG score recompute
  19. 2026-09-09 13:40 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 13:48 UTCEG score recompute
  4. 2026-09-07 13:48 UTCVendor advisory
  5. 2026-09-07 13:48 UTCGHSA enrichment
  6. 2026-09-07 12:31 UTCEG score recompute
  7. 2026-09-07 12:31 UTCVendor advisory
  8. 2026-09-07 12:31 UTCGHSA enrichment
  9. 2026-09-06 20:27 UTCEG score recompute
  10. 2026-09-06 20:27 UTCVendor advisory
  11. 2026-09-06 20:27 UTCGHSA enrichment
  12. 2026-09-06 19:44 UTCEG score recompute
  13. 2026-09-06 19:44 UTCVendor advisory
  14. 2026-09-06 19:44 UTCGHSA enrichment
  15. 2026-09-06 13:47 UTCEPSS rescore
  16. 2026-09-05 16:25 UTCEG score recompute
  17. 2026-09-05 16:25 UTCVendor advisory
  18. 2026-09-05 16:24 UTCGHSA enrichment
  19. 2026-09-05 15:43 UTCEG score recompute
  20. 2026-09-05 15:43 UTCVendor advisory
  21. 2026-09-05 15:43 UTCGHSA enrichment
  22. 2026-09-04 05:06 UTCEPSS rescore
  23. 2026-09-02 14:12 UTCEPSS rescore
  24. 2026-09-01 13:54 UTCEPSS rescore
  25. 2026-09-01 13:42 UTCEG score recompute
  26. 2026-09-01 13:42 UTCVendor advisory
  27. 2026-09-01 13:42 UTCGHSA enrichment
  28. 2026-09-01 12:18 UTCEG score recompute
  29. 2026-09-01 12:18 UTCVendor advisory
  30. 2026-09-01 12:18 UTCGHSA enrichment
  31. 2026-09-01 03:37 UTCEG score recompute
  32. 2026-09-01 03:37 UTCVendor advisory
  33. 2026-09-01 03:36 UTCGHSA enrichment
  34. 2026-09-01 02:42 UTCEG score recompute
  35. 2026-09-01 02:42 UTCVendor advisory
  36. 2026-09-01 02:41 UTCGHSA enrichment
  37. 2026-08-30 20:34 UTCEG score recompute
  38. 2026-08-30 20:34 UTCVendor advisory
  39. 2026-08-30 20:34 UTCGHSA enrichment
  40. 2026-08-30 19:17 UTCEPSS rescore
  41. 2026-08-30 01:22 UTCEPSS rescore
  42. 2026-08-28 21:41 UTCEPSS rescore
  43. 2026-08-27 14:25 UTCEPSS rescore
  44. 2026-08-26 14:46 UTCEPSS rescore
  45. 2026-08-25 13:49 UTCEPSS rescore
  46. 2026-08-25 01:46 UTCEG score recompute
  47. 2026-08-25 01:46 UTCVendor advisory
  48. 2026-08-25 01:46 UTCGHSA enrichment
  49. 2026-08-24 13:56 UTCEG score recompute
  50. 2026-08-24 13:56 UTCVendor advisory
  51. 2026-08-24 13:56 UTCGHSA enrichment
  52. 2026-08-23 22:27 UTCVendor advisory
  53. 2026-08-23 22:27 UTCGHSA enrichment
  54. 2026-08-23 10:38 UTCEG score recompute
  55. 2026-08-23 10:38 UTCVendor advisory
  56. 2026-08-23 10:38 UTCGHSA enrichment
  57. 2026-08-23 00:19 UTCEPSS rescore
  58. 2026-08-22 22:50 UTCVendor advisory
  59. 2026-08-22 22:50 UTCGHSA enrichment
  60. 2026-08-21 19:18 UTCVendor advisory
  61. 2026-08-21 19:18 UTCGHSA enrichment
  62. 2026-08-21 07:29 UTCEG score recompute
  63. 2026-08-21 07:29 UTCVendor advisory
  64. 2026-08-21 07:29 UTCGHSA enrichment
  65. 2026-08-20 22:55 UTCEPSS rescore
  66. 2026-08-20 19:40 UTCVendor advisory
  67. 2026-08-20 19:40 UTCGHSA enrichment
  68. 2026-08-20 07:52 UTCEG score recompute
  69. 2026-08-20 07:52 UTCVendor advisory
  70. 2026-08-20 07:52 UTCGHSA enrichment
  71. 2026-08-19 17:04 UTCEPSS rescore
  72. 2026-08-19 04:54 UTCEG score recompute
  73. 2026-08-19 04:54 UTCVendor advisory
  74. 2026-08-19 04:54 UTCGHSA enrichment
  75. 2026-08-18 13:48 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

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redhat:RHSA-2026:47173

Frequently asked(5)

What is CVE-2026-54099?
CVE-2026-54099 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. The WICD CSR auto-approver validates that a Certificate Signing Request contains the organization system:wicd-nodes but does not reject additional organization values such as system:masters. A…
When was CVE-2026-54099 disclosed?
CVE-2026-54099 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-2026-54099 actively exploited?
CVE-2026-54099 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 98.6% of all scored CVEs.
What is the CVSS score of CVE-2026-54099?
CVE-2026-54099 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-54099?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54099, 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

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