CVE-2026-64776

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.

The issue was addressed with improved bounds checks. 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
8%
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-2026-64776(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 13× in last 7d / 75× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 23:41 UTCEG score recompute
  3. 2026-08-29 23:41 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-27 09:38 UTCEG score recompute
  6. 2026-08-27 09:38 UTCGHSA enrichment
  7. 2026-08-26 14:47 UTCEPSS rescore
  8. 2026-08-26 08:40 UTCEG score recompute
  9. 2026-08-26 08:40 UTCGHSA enrichment
  10. 2026-08-25 13:49 UTCEPSS rescore
  11. 2026-08-25 08:04 UTCEG score recompute
  12. 2026-08-25 08:03 UTCGHSA enrichment
  13. 2026-08-24 07:31 UTCGHSA enrichment
  14. 2026-08-23 06:51 UTCGHSA enrichment
  15. 2026-08-22 06:21 UTCEG score recompute
  16. 2026-08-22 06:21 UTCGHSA enrichment
  17. 2026-08-21 23:49 UTCEPSS rescore
  18. 2026-08-21 05:51 UTCEG score recompute
  19. 2026-08-21 05:51 UTCGHSA enrichment
  20. 2026-08-20 22:55 UTCEPSS rescore
  21. 2026-08-20 05:21 UTCEG score recompute
  22. 2026-08-20 05:21 UTCGHSA enrichment
  23. 2026-08-19 17:04 UTCEPSS rescore
  24. 2026-08-19 04:51 UTCEG score recompute
  25. 2026-08-19 04:51 UTCGHSA enrichment
Show 66 more
  1. 2026-08-18 13:48 UTCEPSS rescore
  2. 2026-08-18 04:21 UTCEG score recompute
  3. 2026-08-18 04:21 UTCGHSA enrichment
  4. 2026-08-17 13:47 UTCEPSS rescore
  5. 2026-08-17 03:48 UTCEG score recompute
  6. 2026-08-17 03:48 UTCGHSA enrichment
  7. 2026-08-16 14:56 UTCEPSS rescore
  8. 2026-08-16 03:18 UTCEG score recompute
  9. 2026-08-16 03:18 UTCGHSA enrichment
  10. 2026-08-15 02:48 UTCEG score recompute
  11. 2026-08-15 02:48 UTCGHSA enrichment
  12. 2026-08-15 01:30 UTCEPSS rescore
  13. 2026-08-14 02:17 UTCEG score recompute
  14. 2026-08-14 02:17 UTCGHSA enrichment
  15. 2026-08-13 22:00 UTCEPSS rescore
  16. 2026-08-13 01:47 UTCEG score recompute
  17. 2026-08-13 01:47 UTCGHSA enrichment
  18. 2026-08-12 13:51 UTCEPSS rescore
  19. 2026-08-12 01:17 UTCEG score recompute
  20. 2026-08-12 01:17 UTCGHSA enrichment
  21. 2026-08-11 00:48 UTCEG score recompute
  22. 2026-08-11 00:48 UTCGHSA enrichment
  23. 2026-08-11 00:00 UTCEPSS rescore
  24. 2026-08-10 00:18 UTCEG score recompute
  25. 2026-08-10 00:18 UTCGHSA enrichment
  26. 2026-08-09 13:47 UTCEPSS rescore
  27. 2026-08-08 23:49 UTCEG score recompute
  28. 2026-08-08 23:49 UTCGHSA enrichment
  29. 2026-08-08 16:37 UTCEPSS rescore
  30. 2026-08-07 23:19 UTCGHSA enrichment
  31. 2026-08-06 22:50 UTCEG score recompute
  32. 2026-08-06 22:50 UTCGHSA enrichment
  33. 2026-08-06 13:47 UTCEPSS rescore
  34. 2026-08-05 22:09 UTCEG score recompute
  35. 2026-08-05 22:09 UTCGHSA enrichment
  36. 2026-08-05 19:17 UTCEPSS rescore
  37. 2026-08-05 19:17 UTCEPSS rescore
  38. 2026-08-04 21:40 UTCEG score recompute
  39. 2026-08-04 21:39 UTCGHSA enrichment
  40. 2026-08-04 10:39 UTCEPSS rescore
  41. 2026-08-03 21:09 UTCEG score recompute
  42. 2026-08-03 21:09 UTCGHSA enrichment
  43. 2026-08-03 10:36 UTCEPSS rescore
  44. 2026-08-02 20:39 UTCEG score recompute
  45. 2026-08-02 20:39 UTCGHSA enrichment
  46. 2026-08-02 02:27 UTCEPSS rescore
  47. 2026-08-01 20:09 UTCEG score recompute
  48. 2026-08-01 20:09 UTCGHSA enrichment
  49. 2026-08-01 04:16 UTCEPSS rescore
  50. 2026-07-31 19:39 UTCGHSA enrichment
  51. 2026-07-30 19:08 UTCEG score recompute
  52. 2026-07-30 19:08 UTCGHSA enrichment
  53. 2026-07-30 16:28 UTCEPSS rescore
  54. 2026-07-30 01:30 UTCEPSS rescore
  55. 2026-07-30 01:30 UTCEPSS rescore
  56. 2026-07-29 18:37 UTCEG score recompute
  57. 2026-07-29 18:37 UTCGHSA enrichment
  58. 2026-07-28 18:06 UTCGHSA enrichment
  59. 2026-07-28 16:41 UTCGHSA enrichment
  60. 2026-07-28 16:14 UTCEG score recompute▲ 5.50
  61. 2026-07-28 16:14 UTCGHSA enrichment
  62. 2026-07-28 16:13 UTCMITRE cvelistV5CVSS v3 → 5.5 · severity → MEDIUM
  63. 2026-07-28 15:37 UTCEPSS rescore
  64. 2026-07-27 21:19 UTCNVD update
  65. 2026-07-27 20:26 UTCEG score recompute
  66. 2026-07-27 20:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-64776?
CVE-2026-64776 is a medium vulnerability published on July 27, 2026. The issue was addressed with improved bounds checks. 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-2026-64776 disclosed?
CVE-2026-64776 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-2026-64776 actively exploited?
CVE-2026-64776 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 92.3% of all scored CVEs.
What is the CVSS score of CVE-2026-64776?
CVE-2026-64776 has a CVSS v3.1 base score of 5.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-64776?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64776, 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-2026-64776

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