CVE-2026-64767

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 buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.

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
50%
KEV
Not listed

Published

July 27, 2026

Last Modified

July 28, 2026

Advisory Details (3)

Auto-updated Sep 9, 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-2026-64767(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 35× in last 7d / 168× 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 340 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-64767?
CVE-2026-64767 is a critical vulnerability published on July 27, 2026. A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.
When was CVE-2026-64767 disclosed?
CVE-2026-64767 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-2026-64767 actively exploited?
CVE-2026-64767 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 49.6% of all scored CVEs.
What is the CVSS score of CVE-2026-64767?
CVE-2026-64767 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-64767?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64767, 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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