CVE-2026-84578

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-14. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 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

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

A logic issue was addressed with improved checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to break out of its sandbox.

CVSS v3
8.8
EG Score
8.8(high)
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
4%
KEV
Not listed

Published

September 14, 2026

Last Modified

September 18, 2026

Advisory Details (3)

Auto-updated Sep 17, 2026
No patch confirmed yet.
generic

About the security content of macOS Sequoia 15.8 - Apple Support

https://support.apple.com/en-us/149043
generic

About the security content of macOS Tahoe 26.7 - Apple Support

https://support.apple.com/en-us/149042
generic

About the security content of macOS Golden Gate 27 - Apple Support

https://support.apple.com/en-us/149035

Vendor Advisories for CVE-2026-84578(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 20× in last 7d / 20× 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 16:27 UTCEG score recompute
  2. 2026-09-19 16:27 UTCGHSA enrichment
  3. 2026-09-19 04:30 UTCEG score recompute
  4. 2026-09-19 04:29 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-18 16:32 UTCGHSA enrichment
  7. 2026-09-18 04:35 UTCGHSA enrichment
  8. 2026-09-18 04:04 UTCEG score recompute
  9. 2026-09-18 04:04 UTCGHSA enrichment
  10. 2026-09-17 19:32 UTCEPSS rescore
  11. 2026-09-17 18:08 UTCGHSA enrichment
  12. 2026-09-17 15:35 UTCEG score recompute▲ 8.80
  13. 2026-09-17 15:35 UTCGHSA enrichment
  14. 2026-09-17 15:34 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  15. 2026-09-16 14:09 UTCEPSS rescore
  16. 2026-09-16 05:15 UTCEPSS rescore
  17. 2026-09-15 14:55 UTCGHSA enrichment
  18. 2026-09-14 21:22 UTCNVD update
  19. 2026-09-14 20:56 UTCEG score recompute
  20. 2026-09-14 20:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84578?
CVE-2026-84578 is a high vulnerability published on September 14, 2026. A logic issue was addressed with improved checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to break out of its sandbox.
When was CVE-2026-84578 disclosed?
CVE-2026-84578 was first published in the National Vulnerability Database on September 14, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84578 actively exploited?
CVE-2026-84578 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 96.4% of all scored CVEs.
What is the CVSS score of CVE-2026-84578?
CVE-2026-84578 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-84578?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84578, 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-2026-84578

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