CVE-2026-64740

CRITICALPre-NVD 9.39.8▲
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-27. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.3; sources differ by 0.5.

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: 0%CVSS: 9.3Exploit: None knownExposed: 0

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

A parsing issue in the handling of directory paths was addressed with improved path validation. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6. A malicious app may be able to break out of its sandbox.

CVSS v3
9.3
EG Score
9.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

July 27, 2026

Last Modified

August 17, 2026

Advisory Details (6)

Auto-updated Aug 23, 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 tvOS 26.6 - Apple Support

https://support.apple.com/en-us/128069
generic

About the security content of macOS Tahoe 26.6 - Apple Support

https://support.apple.com/en-us/128067
generic

About the security content of iOS 26.6 and iPadOS 26.6 - Apple Support

https://support.apple.com/en-us/128066

Vendor Advisories for CVE-2026-64740(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 42× in last 7d / 224× 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 258 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64740?
CVE-2026-64740 is a critical vulnerability published on July 27, 2026. A parsing issue in the handling of directory paths was addressed with improved path validation. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6. A malicious app may be able to break out of its…
When was CVE-2026-64740 disclosed?
CVE-2026-64740 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-2026-64740 actively exploited?
CVE-2026-64740 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 87.6% of all scored CVEs.
What is the CVSS score of CVE-2026-64740?
CVE-2026-64740 has a CVSS v3.1 base score of 9.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.
How do I remediate CVE-2026-64740?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64740, 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.

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