CVE-2026-64728

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-07-27. 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: 0.4%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A permissions issue was addressed with improved validation. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. Maliciously crafted web content may violate iframe sandboxing policy.

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
0.4%
EPSS %ILE
29th
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

July 27, 2026

Last Modified

July 28, 2026

Advisory Details (6)

Auto-updated Jul 28, 2026
Patch available.
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 tvOS 26.6 - Apple Support

https://support.apple.com/en-us/128069
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-2026-64728(3)

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

Patch Availability(3)

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

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 ... 2.52.5-1~deb13u1 (50 versions)
  • every version up to 2.52.6-1~deb13u1: fixed in 2.52.6-1~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 ... 2.52.6-1~deb13u1 (51 versions)
  • every version up to 2.52.6-1: fixed in 2.52.6-1
—
wpewebkit2.48.3-1 ... 2.52.5-1 (19 versions)
  • every version up to 2.52.6-1: fixed in 2.52.6-1
—

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 13× in last 7d / 77× 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 211 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-64728?
CVE-2026-64728 is a medium vulnerability published on July 27, 2026. A permissions issue was addressed with improved validation. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. Maliciously crafted web content may violate iframe sandboxing policy.
When was CVE-2026-64728 disclosed?
CVE-2026-64728 was first published 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-2026-64728 actively exploited?
CVE-2026-64728 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64728?
CVE-2026-64728 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-64728?
A fix for CVE-2026-64728 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-64728 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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