CVE-2026-64699

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-07-27. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

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

A memory initialization issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to disclose kernel memory.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
11%
KEV
Not listed

Published

July 27, 2026

Last Modified

July 28, 2026

Advisory Details (3)

Auto-updated Jul 28, 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-2026-64699(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 17× in last 7d / 73× 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 150 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64699?
CVE-2026-64699 is a medium vulnerability published on July 27, 2026. A memory initialization issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to disclose kernel memory.
When was CVE-2026-64699 disclosed?
CVE-2026-64699 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-2026-64699 actively exploited?
CVE-2026-64699 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 89.2% of all scored CVEs.
What is the CVSS score of CVE-2026-64699?
CVE-2026-64699 has a CVSS v3.1 base score of 5.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-64699?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64699, 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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