CVE-2026-64787

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-08-18. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

A fix is available — apply it.

A use-after-free issue was addressed with improved memory management. 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, tvOS 27, visionOS 27, watchOS 27. Processing maliciously crafted web content may lead to an unexpected process termination.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

August 17, 2026

Last Modified

September 14, 2026

Advisory Details (2)

Auto-updated Aug 18, 2026
No patch confirmed yet.
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-2026-64787(10)

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

Patch Availability(10)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuwebkitgtk-webdriver (2.52.6-0ubuntu0.26.04.1) @ resolute2026-09-18ubuntu
redhatwebkit2gtk3-0:2.52.5-1.el8_62026-08-25redhat
redhatwebkit2gtk3-0:2.52.5-1.el8_82026-08-25redhat
redhatwebkitgtk4-0:2.52.5-1.el7_92026-08-24redhat
redhatwebkit2gtk3-0:2.52.5-1.el9_22026-08-24redhat
redhatwebkit2gtk3-0:2.52.5-1.el8_42026-08-20redhat
redhatwebkit2gtk3-0:2.52.5-1.el9_42026-08-13redhat
redhatwebkit2gtk3-0:2.52.5-1.el9_62026-08-13redhat
redhatwebkit2gtk3-0:2.52.5-1.el9_82026-07-20redhat
redhatwebkit2gtk3-0:2.52.5-1.el8_102026-07-20redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFixed inDependents
webkit2gtk2.40.1-1 ... 2.53.91-1 (165 versions)——
wpewebkit2.38.6-1 ... 2.52.6-1 (54 versions)——
Debian:13(2)
PackageVulnerable rangeFixed inDependents
webkit2gtk2.48.3-1 ... 2.52.4-1 (48 versions)2.52.5-1~deb13u1—
wpewebkit2.48.3-1 ... 2.52.6-1 (20 versions)——
Debian:14(2)
PackageVulnerable rangeFixed inDependents
webkit2gtk2.48.3-1 ... 2.52.5-1~deb13u1 (49 versions)2.52.5-1—
wpewebkit2.48.3-1 ... 2.52.4-1 (18 versions)2.52.5-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 27× in last 7d / 109× 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 126 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-64787?
CVE-2026-64787 is a medium vulnerability published on August 17, 2026. A use-after-free issue was addressed with improved memory management. 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, tvOS 27, visionOS 27, watchOS 27. Processing maliciously crafted web content may lead to an unexpected…
When was CVE-2026-64787 disclosed?
CVE-2026-64787 was first published in the National Vulnerability Database 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-2026-64787 actively exploited?
CVE-2026-64787 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 73.3% of all scored CVEs.
What is the CVSS score of CVE-2026-64787?
CVE-2026-64787 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-64787?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64787, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-64787

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