CVE-2026-71576

HIGHPre-NVD 8.58.5—
EchelonGraph scoreMEDIUM confidence

Score 8.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-10. A secondary CVSS source baseline 8.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this week
8.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 8.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in multicluster-global-hub. The manager component improperly validates the source identity of incoming CloudEvents on Kafka status topics. A remote attacker, after compromising a managed hub and obtaining its Kafka client certificate, can manipulate the self-asserted source identity. This allows the attacker to falsify or delete critical data, such as compliance, inventory, and cluster health information, belonging to other hubs in the database.

CVSS v3
8.5
EG Score
8.5HIGHmedium confidence
EG Risk
38
EG Risk 38/100CISA SSVC

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
Severity85% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
20th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 10, 2026

Last Modified

September 29, 2026

Advisory Details (2)

Auto-updated Aug 10, 2026
Patch available. Sources: redhat.
redhat

2512513 – (CVE-2026-71576) CVE-2026-71576 multicluster-global-hub: multicluster-global-hub: Manager trusts self-asserted evt.Source() for leaf-hub identity in all status handlers

https://bugzilla.redhat.com/show_bug.cgi?id=2512513
redhat Patch Available

CVE-2026-71576 - 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-2026-71576

Vendor Advisories for CVE-2026-71576(7)

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

Patch Availability(5)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatmulticluster-globalhub/multicluster-globalhub-manager-rhel9:17900861762026-09-29redhat
redhatmulticluster-globalhub/multicluster-globalhub-manager-rhel9:17883594542026-09-29redhat
redhatmulticluster-globalhub/multicluster-globalhub-manager-rhel9:17895152882026-09-24redhat
redhatmulticluster-globalhub/multicluster-globalhub-manager-rhel9:17883774242026-09-16redhat
redhatmulticluster-globalhub/multicluster-globalhub-manager-rhel9:17883555992026-09-15redhat

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 30× in last 7d / 117× 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 207 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-71576?
CVE-2026-71576 is a high vulnerability published on August 10, 2026. A flaw was found in multicluster-global-hub. The manager component improperly validates the source identity of incoming CloudEvents on Kafka status topics. A remote attacker, after compromising a managed hub and obtaining its Kafka client certificate, can manipulate the self-asserted source…
When was CVE-2026-71576 disclosed?
CVE-2026-71576 was first published on August 10, 2026, with the most recent update on September 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71576 actively exploited?
CVE-2026-71576 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (20th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-71576?
CVE-2026-71576 has a CVSS base score of 8.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-71576?
A fix for CVE-2026-71576 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-71576 are linked in the Vendor Advisories panel on this page.

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