CVE-2026-64783

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-27. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

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

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected Safari crash.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

July 27, 2026

Last Modified

July 28, 2026

Advisory Details (5)

Auto-updated Jul 28, 2026
No patch confirmed yet.
generic

About the security content of Safari 26.6 - Apple Support

https://support.apple.com/en-us/128073
generic

About the security content of visionOS 26.6 - Apple Support

https://support.apple.com/en-us/128070
generic

About the security content of watchOS 26.6 - Apple Support

https://support.apple.com/en-us/128068
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-2026-64783(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 20× in last 7d / 111× 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 132 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-64783?
CVE-2026-64783 is a high vulnerability published on July 27, 2026. A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected Safari crash.
When was CVE-2026-64783 disclosed?
CVE-2026-64783 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-2026-64783 actively exploited?
CVE-2026-64783 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 64.4% of all scored CVEs.
What is the CVSS score of CVE-2026-64783?
CVE-2026-64783 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-64783?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64783, 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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