CVE-2026-89060

HIGHPre-NVD 7.77.7—
EchelonGraph scoreHIGH confidence

Score 7.7 from GitHub Security Advisory (severity: HIGH) published 2026-09-11. a secondary CVSS source baseline 7.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.7Exploit: None knownExposed: 0

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

A cross-namespace authorization flaw in multicluster-observability-addon allows a user with permission to modify a managed cluster’s ManagedClusterAddOn configuration to reference ClusterLogForwarder or OpenTelemetryCollector resources outside the permitted namespace. If those resources reference Secrets, the add-on may copy the referenced Secrets to the attacker-controlled managed cluster.

CVSS v3
7.7
EG Score
7.7(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity77% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

September 11, 2026

Last Modified

September 16, 2026

Advisory Details (3)

Auto-updated Sep 11, 2026
Patch available. Sources: redhat, github_pr.
github_pr

draft: namespace change

Upstream fix in progress (PR #644 · stolostron/multicluster-observability-addon, state=closed)

https://github.com/stolostron/multicluster-observability-addon/pull/644
redhat

2531596 – (CVE-2026-89060) CVE-2026-89060 stolostron/multicluster-observability-addon: Cross-namespace Secret disclosure in multicluster-observability-addon via unvalidated configuration references

https://bugzilla.redhat.com/show_bug.cgi?id=2531596
redhat Patch Available

CVE-2026-89060 - 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-2026-89060

Vendor Advisories for CVE-2026-89060(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 29× in last 7d / 48× 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. 2026-09-19 05:23 UTCEG score recompute
  2. 2026-09-19 05:23 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 18:14 UTCGHSA enrichment
  5. 2026-09-18 06:52 UTCGHSA enrichment
  6. 2026-09-17 19:44 UTCEG score recompute
  7. 2026-09-17 19:44 UTCGHSA enrichment
  8. 2026-09-17 19:32 UTCEPSS rescore
  9. 2026-09-17 07:07 UTCGHSA enrichment
  10. 2026-09-16 19:59 UTCEG score recompute
  11. 2026-09-16 19:59 UTCGHSA enrichment
  12. 2026-09-16 14:09 UTCEPSS rescore
  13. 2026-09-16 12:54 UTCEG score recompute
  14. 2026-09-16 12:54 UTCGHSA enrichment
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-16 01:46 UTCGHSA enrichment
  17. 2026-09-15 14:38 UTCGHSA enrichment
  18. 2026-09-15 03:24 UTCEG score recompute
  19. 2026-09-15 03:24 UTCGHSA enrichment
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-14 16:16 UTCGHSA enrichment
  22. 2026-09-14 05:08 UTCGHSA enrichment
  23. 2026-09-13 17:59 UTCEG score recompute
  24. 2026-09-13 17:59 UTCGHSA enrichment
  25. 2026-09-13 16:48 UTCEPSS rescore
Show 23 more
  1. 2026-09-13 06:50 UTCGHSA enrichment
  2. 2026-09-12 19:39 UTCEG score recompute
  3. 2026-09-12 19:39 UTCGHSA enrichment
  4. 2026-09-12 15:02 UTCEPSS rescore
  5. 2026-09-12 08:30 UTCGHSA enrichment
  6. 2026-09-11 21:22 UTCEG score recompute
  7. 2026-09-11 21:22 UTCGHSA enrichment
  8. 2026-09-11 20:34 UTCEG score recompute
  9. 2026-09-11 20:34 UTCGHSA enrichment
  10. 2026-09-11 19:59 UTCEG score recompute
  11. 2026-09-11 19:59 UTCGHSA enrichment
  12. 2026-09-11 15:29 UTCEG score recompute
  13. 2026-09-11 15:29 UTCGHSA enrichment
  14. 2026-09-11 14:53 UTCEPSS rescore
  15. 2026-09-11 14:53 UTCEPSS rescore
  16. 2026-09-11 14:23 UTCEG score recompute
  17. 2026-09-11 14:23 UTCGHSA enrichment
  18. 2026-09-11 13:55 UTCGHSA enrichment
  19. 2026-09-11 13:35 UTCEG score recompute
  20. 2026-09-11 13:35 UTCGHSA enrichment
  21. 2026-09-11 05:22 UTCEG score recompute
  22. 2026-09-11 04:35 UTCEG score recompute
  23. 2026-09-11 04:34 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-89060?
CVE-2026-89060 is a high vulnerability published on September 11, 2026. A cross-namespace authorization flaw in multicluster-observability-addon allows a user with permission to modify a managed cluster’s ManagedClusterAddOn configuration to reference ClusterLogForwarder or OpenTelemetryCollector resources outside the permitted namespace. If those resources reference…
When was CVE-2026-89060 disclosed?
CVE-2026-89060 was first published in the National Vulnerability Database on September 11, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-89060 actively exploited?
CVE-2026-89060 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 85.8% of all scored CVEs.
What is the CVSS score of CVE-2026-89060?
CVE-2026-89060 has a CVSS v3 base score of 7.7 (NVD).
How do I remediate CVE-2026-89060?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-89060, 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-2026-89060

Explore →

Is Your Infrastructure Affected by CVE-2026-89060?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs