CVE-2026-64738

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-27. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A malicious app may be able to break out of its sandbox.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

July 27, 2026

Last Modified

July 30, 2026

Advisory Details (3)

Auto-updated Jul 30, 2026
No patch confirmed yet.
generic

About the security content of macOS Sonoma 14.8.8 - Apple Support

https://support.apple.com/en-us/128072
generic

About the security content of macOS Sequoia 15.7.8 - Apple Support

https://support.apple.com/en-us/128071
generic

About the security content of macOS Tahoe 26.6 - Apple Support

https://support.apple.com/en-us/128067

Vendor Advisories for CVE-2026-64738(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 36× in last 7d / 36× 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. 2026-07-31 21:54 UTCGHSA enrichment
  2. 2026-07-31 18:02 UTCGHSA enrichment
  3. 2026-07-31 14:10 UTCGHSA enrichment
  4. 2026-07-31 10:17 UTCGHSA enrichment
  5. 2026-07-31 06:24 UTCGHSA enrichment
  6. 2026-07-31 02:31 UTCGHSA enrichment
  7. 2026-07-30 22:38 UTCGHSA enrichment
  8. 2026-07-30 18:47 UTCEG score recompute
  9. 2026-07-30 18:47 UTCGHSA enrichment
  10. 2026-07-30 16:28 UTCEPSS rescore
  11. 2026-07-30 14:49 UTCGHSA enrichment
  12. 2026-07-30 11:41 UTCEG score recompute
  13. 2026-07-30 11:41 UTCGHSA enrichment
  14. 2026-07-30 07:50 UTCGHSA enrichment
  15. 2026-07-30 03:55 UTCEG score recompute
  16. 2026-07-30 03:55 UTCGHSA enrichment
  17. 2026-07-30 01:30 UTCEPSS rescore
  18. 2026-07-30 01:30 UTCEPSS rescore
  19. 2026-07-30 00:01 UTCGHSA enrichment
  20. 2026-07-29 20:05 UTCGHSA enrichment
  21. 2026-07-29 16:09 UTCGHSA enrichment
  22. 2026-07-29 12:17 UTCGHSA enrichment
  23. 2026-07-29 08:24 UTCGHSA enrichment
  24. 2026-07-29 04:30 UTCGHSA enrichment
  25. 2026-07-29 00:37 UTCGHSA enrichment
Show 11 more
  1. 2026-07-28 20:45 UTCEG score recompute
  2. 2026-07-28 20:45 UTCGHSA enrichment
  3. 2026-07-28 17:24 UTCGHSA enrichment
  4. 2026-07-28 16:54 UTCEG score recompute▲ 9.80
  5. 2026-07-28 16:54 UTCGHSA enrichment
  6. 2026-07-28 16:53 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  7. 2026-07-28 15:37 UTCEPSS rescore
  8. 2026-07-27 21:32 UTCGHSA enrichment
  9. 2026-07-27 21:19 UTCNVD update
  10. 2026-07-27 20:32 UTCEG score recompute
  11. 2026-07-27 20:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-64738?
CVE-2026-64738 is a critical vulnerability published on July 27, 2026. A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A malicious app may be able to break out of its sandbox.
When was CVE-2026-64738 disclosed?
CVE-2026-64738 was first published in the National Vulnerability Database on July 27, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64738 actively exploited?
CVE-2026-64738 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 68.7% of all scored CVEs.
What is the CVSS score of CVE-2026-64738?
CVE-2026-64738 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-64738?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64738, 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-2026-64738

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