CVE-2026-71577

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreHIGH confidence

Score 6.3 from GitHub Security Advisory published 2026-08-10. a secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: None knownExposed: 0

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

A flaw was found in multicluster-global-hub. During a ManagedClusterMigration, the system incorrectly grants all managed hubs read access to a shared communication topic. This allows a compromised managed hub to intercept and collect sensitive bootstrap kubeconfigs, which contain API server tokens intended for other hubs. These tokens have an extended validity of approximately 9.86 years, significantly increasing the risk of unauthorized access and information disclosure to other managed clusters.

CVSS v3
6.3
EG Score
6.3(high)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity63% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

August 10, 2026

Last Modified

August 14, 2026

Advisory Details (2)

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

2512514 – (CVE-2026-71577) CVE-2026-71577 multicluster-global-hub: multicluster-global-hub: Spec-topic Read ACL leaks bootstrap kubeconfigs to all managed hubs during migration

https://bugzilla.redhat.com/show_bug.cgi?id=2512514
redhat Patch Available

CVE-2026-71577 - 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-2026-71577

Vendor Advisories for CVE-2026-71577(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 34× 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. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 14:17 UTCEG score recompute
  3. 2026-08-20 14:17 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 14:13 UTCGHSA enrichment
  6. 2026-08-18 15:18 UTCEG score recompute
  7. 2026-08-18 15:18 UTCGHSA enrichment
  8. 2026-08-18 13:49 UTCEPSS rescore
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-17 16:07 UTCGHSA enrichment
  11. 2026-08-16 17:11 UTCEG score recompute
  12. 2026-08-16 17:11 UTCGHSA enrichment
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 02:15 UTCEPSS rescore
  16. 2026-08-15 18:15 UTCEG score recompute
  17. 2026-08-15 18:15 UTCGHSA enrichment
  18. 2026-08-15 01:31 UTCEPSS rescore
  19. 2026-08-14 19:19 UTCGHSA enrichment
  20. 2026-08-14 00:10 UTCEG score recompute
  21. 2026-08-14 00:10 UTCGHSA enrichment
  22. 2026-08-13 22:00 UTCEPSS rescore
  23. 2026-08-13 01:14 UTCEG score recompute
  24. 2026-08-13 01:14 UTCGHSA enrichment
  25. 2026-08-12 13:51 UTCEPSS rescore
Show 9 more
  1. 2026-08-12 02:18 UTCEG score recompute
  2. 2026-08-12 02:18 UTCGHSA enrichment
  3. 2026-08-11 03:22 UTCEG score recompute
  4. 2026-08-11 03:22 UTCGHSA enrichment
  5. 2026-08-11 02:18 UTCEG score recompute
  6. 2026-08-11 02:18 UTCGHSA enrichment
  7. 2026-08-10 17:22 UTCEG score recompute
  8. 2026-08-10 16:50 UTCEG score recompute
  9. 2026-08-10 16:49 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-71577?
CVE-2026-71577 is a medium vulnerability published on August 10, 2026. A flaw was found in multicluster-global-hub. During a ManagedClusterMigration, the system incorrectly grants all managed hubs read access to a shared communication topic. This allows a compromised managed hub to intercept and collect sensitive bootstrap kubeconfigs, which contain API server tokens…
When was CVE-2026-71577 disclosed?
CVE-2026-71577 was first published in the National Vulnerability Database on August 10, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71577 actively exploited?
CVE-2026-71577 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 90.9% of all scored CVEs.
What is the CVSS score of CVE-2026-71577?
CVE-2026-71577 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-71577?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71577, 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-2026-71577

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