CVE-2026-28947

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-11. 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
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

A fix is available — apply it.

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. 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
31%
KEV
Not listed

Published

May 11, 2026

Last Modified

August 17, 2026

Advisory Details (5)

Auto-updated May 12, 2026
No patch confirmed yet.
generic

About the security content of visionOS 26.5 - Apple Support

https://support.apple.com/en-us/127120
generic

About the security content of watchOS 26.5 - Apple Support

https://support.apple.com/en-us/127119
generic

About the security content of tvOS 26.5 - Apple Support

https://support.apple.com/en-us/127118
generic

About the security content of macOS Tahoe 26.5 - Apple Support

https://support.apple.com/en-us/127115
generic

About the security content of iOS 26.5 and iPadOS 26.5 - Apple Support

https://support.apple.com/en-us/127110

Vendor Advisories for CVE-2026-28947(10)

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

Patch Availability(9)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatwebkit2gtk3-0:2.52.4-1.el9_62026-06-25redhat
redhatwebkit2gtk3-0:2.52.4-1.el9_42026-06-23redhat
redhatwebkit2gtk3-0:2.52.4-1.el9_22026-06-23redhat
redhatwebkit2gtk3-0:2.52.4-1.el8_62026-06-23redhat
redhatwebkit2gtk3-0:2.52.4-1.el8_82026-06-22redhat
redhatwebkitgtk4-0:2.52.4-1.el7_92026-06-22redhat
redhatwebkit2gtk3-0:2.52.4-1.el8_42026-06-22redhat
redhatwebkit2gtk3-0:2.52.4-1.el8_102026-06-15redhat
redhatwebkit2gtk3-0:2.52.4-1.el9_82026-06-15redhat

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

(8 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
webkit2gtk2.32.3-1 ... 2.53.4-1 (246 versions)——
wpewebkit2.32.3-2 ... 2.52.5-1 (90 versions)——
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 ... 2.52.3-2~deb13u1 (47 versions)2.52.4-1—
wpewebkit2.48.3-1 ... 2.52.3-1 (17 versions)2.52.4-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 39× 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 267 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-28947?
CVE-2026-28947 is a high vulnerability published on May 11, 2026. A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing maliciously crafted web content may lead to an unexpected Safari…
When was CVE-2026-28947 disclosed?
CVE-2026-28947 was first published in the National Vulnerability Database on May 11, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-28947 actively exploited?
CVE-2026-28947 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 68.7% of all scored CVEs.
What is the CVSS score of CVE-2026-28947?
CVE-2026-28947 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-28947?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-28947, 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-2026-28947

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