CVE-2026-6383

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-04-15. NVD baseline CVSS 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 0

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

A flaw was found in KubeVirt's Role-Based Access Control (RBAC) evaluation logic. The authorization mechanism improperly truncates subresource names, leading to incorrect permission evaluations. This allows authenticated users with specific custom roles to gain unauthorized access to subresources, potentially disclosing sensitive information or performing actions they are not permitted to do. Additionally, legitimate users may be denied access to resources.

CVSS v3
5.4
EG Score
5.4(medium)
EPSS
4.6%
KEV
Not listed

Published

April 15, 2026

Last Modified

April 17, 2026

References (2)

Vendor Advisories for CVE-2026-6383(1)

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
gokubevirt.io/kubevirt—ghsa

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.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
kubevirt.io/kubevirt———

Weakness Classification(1)

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

Data Freshness Timeline

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-6383?
CVE-2026-6383 is a medium vulnerability published on April 15, 2026. A flaw was found in KubeVirt's Role-Based Access Control (RBAC) evaluation logic. The authorization mechanism improperly truncates subresource names, leading to incorrect permission evaluations. This allows authenticated users with specific custom roles to gain unauthorized access to subresources,…
When was CVE-2026-6383 disclosed?
CVE-2026-6383 was first published in the National Vulnerability Database on April 15, 2026, with the most recent update on April 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6383 actively exploited?
CVE-2026-6383 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-6383?
CVE-2026-6383 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-6383?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6383, 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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