CVE-2026-43658

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-11. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

The issue was addressed with improved memory handling. 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
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

May 11, 2026

Last Modified

August 18, 2026

Advisory Details (6)

Auto-updated May 13, 2026
No patch confirmed yet.
generic

About the security content of Safari 26.5 - Apple Support

https://support.apple.com/en-us/127121
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-2026-43658(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
redhatwebkit2gtk3-0:2.52.4-1.el8_42026-06-22redhat
redhatwebkitgtk4-0:2.52.4-1.el7_92026-06-22redhat
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(2)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 27× 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 233 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-43658?
CVE-2026-43658 is a high vulnerability published on May 11, 2026. The issue was addressed with improved memory handling. 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.
When was CVE-2026-43658 disclosed?
CVE-2026-43658 was first published in the National Vulnerability Database on May 11, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43658 actively exploited?
CVE-2026-43658 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 75.1% of all scored CVEs.
What is the CVSS score of CVE-2026-43658?
CVE-2026-43658 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-43658?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43658, 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-2026-43658

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