CVE-2026-43734

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-06-29. 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%CVSS: 6.5Exploit: 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 26.5.2, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected process crash.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

June 29, 2026

Last Modified

August 17, 2026

Advisory Details (3)

Auto-updated Jun 29, 2026
No patch confirmed yet.
generic

About the security content of Safari 26.5.2 - Apple Support

https://support.apple.com/en-us/127685
generic

About the security content of macOS Tahoe 26.5.2 - Apple Support

https://support.apple.com/en-us/127595
generic

About the security content of iOS 26.5.2 and iPadOS 26.5.2 - Apple Support

https://support.apple.com/en-us/127594

Vendor Advisories for CVE-2026-43734(10)

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

Patch Availability(10)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuwebkit2gtk-driver (2.52.6-0ubuntu0.24.04.1) @ noble2026-09-18ubuntu
redhatwebkit2gtk3-0:2.52.5-1.el8_82026-08-25redhat
redhatwebkit2gtk3-0:2.52.5-1.el8_62026-08-25redhat
redhatwebkit2gtk3-0:2.52.5-1.el9_22026-08-24redhat
redhatwebkitgtk4-0:2.52.5-1.el7_92026-08-24redhat
redhatwebkit2gtk3-0:2.52.5-1.el8_42026-08-20redhat
redhatwebkit2gtk3-0:2.52.5-1.el9_62026-08-13redhat
redhatwebkit2gtk3-0:2.52.5-1.el9_42026-08-13redhat
redhatwebkit2gtk3-0:2.52.5-1.el9_82026-07-20redhat
redhatwebkit2gtk3-0:2.52.5-1.el8_102026-07-20redhat

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

(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 ... 2.52.5-1~deb13u1 (49 versions)2.52.5-1—
wpewebkit2.48.3-1 ... 2.52.4-1 (18 versions)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 15× in last 7d / 54× 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 199 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-43734?
CVE-2026-43734 is a medium vulnerability published on June 29, 2026. A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5.2, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected…
When was CVE-2026-43734 disclosed?
CVE-2026-43734 was first published in the National Vulnerability Database on June 29, 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-2026-43734 actively exploited?
CVE-2026-43734 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 66.7% of all scored CVEs.
What is the CVSS score of CVE-2026-43734?
CVE-2026-43734 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-43734?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43734, 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-2026-43734

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