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
32%
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 6× in last 7d / 32× 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 272 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 68.3% 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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