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 — Patch released this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.5Exploit: None knownExposed services: Not assessed

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
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100CISA 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
24th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

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 (2)

Auto-updated Aug 18, 2026
Patch available.
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(12)

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

Patch Availability(12)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuwebkitgtk-webdriver (2.52.6-0ubuntu0.26.04.1) @ resolute2026-10-04ubuntu
redhatwebkit2gtk3-0:2.54.0-1.el8_102026-09-30redhat
redhatwebkit2gtk3-0:2.54.0-1.el9_82026-09-21redhat
redhatwebkit2gtk3-0:2.52.5-1.el8_82026-08-25redhat
redhatwebkit2gtk3-0:2.52.5-1.el8_62026-08-25redhat
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.el8_102026-07-20redhat
redhatwebkit2gtk3-0:2.52.5-1.el9_82026-07-20redhat

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 rangeFix by version rangeDependents
webkit2gtk2.40.1-1 ... 2.54.0-1~exp1 (167 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 ... 2.52.4-1 (48 versions)
  • every version up to 2.52.5-1~deb13u1: fixed in 2.52.5-1~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 ... 2.52.5-1~deb13u1 (49 versions)
  • every version up to 2.52.5-1: fixed in 2.52.5-1
—
wpewebkit2.48.3-1 ... 2.52.4-1 (18 versions)
  • every version up to 2.52.5-1: fixed in 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 23× in last 7d / 101× 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 175 total refreshes for this CVE.

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

Related CVEs(same product + 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 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 0.3% probability of exploitation in the next 30 days (24th percentile of EPSS-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?
A fix for CVE-2026-64787 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-64787 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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