CVE-2026-64731

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM 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 — 3 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: 1%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 path handling issue was addressed with improved validation. This issue is fixed in macOS Sequoia 15.7.8, macOS Tahoe 26.6. A malicious app may be able to break out of its sandbox.

CVSS v3
9.8
EG Score
9.8(medium)
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%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

July 27, 2026

Last Modified

July 28, 2026

Advisory Details (2)

Auto-updated Aug 25, 2026
No patch confirmed yet.
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-2026-64731(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 40× in last 7d / 213× 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 244 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-64731?
CVE-2026-64731 is a critical vulnerability published on July 27, 2026. A path handling issue was addressed with improved validation. This issue is fixed in macOS Sequoia 15.7.8, macOS Tahoe 26.6. A malicious app may be able to break out of its sandbox.
When was CVE-2026-64731 disclosed?
CVE-2026-64731 was first published in the National Vulnerability Database on July 27, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64731 actively exploited?
CVE-2026-64731 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 53.5% of all scored CVEs.
What is the CVSS score of CVE-2026-64731?
CVE-2026-64731 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-64731?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64731, 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

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