CVE-2026-64781

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-08-18. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 4.3Exploit: None knownExposed services: Not assessed

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

The issue was addressed with improved input validation. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, visionOS 27. Processing maliciously crafted web content may lead to an unexpected Safari crash.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
20
EG Risk 20/100CISA SSVC

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
Severity43% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.6%
EPSS %ILE
44th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 17, 2026

Last Modified

September 14, 2026

Advisory Details (3)

Auto-updated Aug 18, 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 iOS 26.6.1 and iPadOS 26.6.1 - Apple Support

https://support.apple.com/en-us/148282
generic

About the security content of macOS Tahoe 26.6.2 - Apple Support

https://support.apple.com/en-us/148281

Vendor Advisories for CVE-2026-64781(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(6 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
webkit2gtk2.40.1-1 ... 2.54.0-1~exp1 (168 versions)
  • every version on: no fix on record
—
wpewebkit2.38.6-1 ... 2.54.0-2 (56 versions)
  • every version on: no fix on record
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
webkit2gtk2.48.3-1 ... 2.53.92-1 (59 versions)
  • every version up to 2.54.0-1~deb13u1: fixed in 2.54.0-1~deb13u1
—
wpewebkit2.48.3-1 ... 2.54.0-2 (22 versions)
  • every version on: no fix on record
—
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
webkit2gtk2.48.3-1 ... 2.54.0-1~exp1 (61 versions)
  • every version on: no fix on record
—
wpewebkit2.48.3-1 ... 2.52.6-1 (20 versions)
  • every version up to 2.54.0-1: fixed in 2.54.0-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 15× in last 7d / 66× 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 122 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-64781?
CVE-2026-64781 is a medium vulnerability published on August 17, 2026. The issue was addressed with improved input validation. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, visionOS 27. Processing maliciously crafted web content may lead to an unexpected Safari crash.
When was CVE-2026-64781 disclosed?
CVE-2026-64781 was first published on August 17, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64781 actively exploited?
CVE-2026-64781 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64781?
CVE-2026-64781 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-64781?
No fix for CVE-2026-64781 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-64781 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-64781

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