CVE-2026-64738

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 permissions issue was addressed with additional restrictions. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, 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(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
46%
KEV
Not listed

Published

July 27, 2026

Last Modified

August 17, 2026

Advisory Details (4)

Auto-updated Sep 14, 2026
No patch confirmed yet.
generic

About the security content of iOS 18.7.10 and iPadOS 18.7.10 - Apple Support

https://support.apple.com/en-us/148287
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 35× in last 7d / 165× 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 332 total refreshes for this CVE.

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

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 iOS 18.7.10 and iPadOS 18.7.10, 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 August 17, 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 1% probability of exploitation in the next 30 days, which ranks it in the top 54.3% 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

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