CVE-2026-28859

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-03-25. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 4.3Exploit: None knownExposed: 0

A fix is available — apply it.

The issue was addressed with improved memory handling. This issue is fixed in Safari 26.4, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. A malicious website may be able to process restricted web content outside the sandbox.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
20(Track)
EG Risk 20/100SSVC: 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
Severity43% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

March 25, 2026

Last Modified

July 15, 2026

Advisory Details (10)

Auto-updated Jul 20, 2026
Patch available. Sources: redhat.
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP So

https://access.redhat.com/errata/RHSA-2026:13845
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Serv

https://access.redhat.com/errata/RHSA-2026:11814
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.6 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:11329
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2026:10702
generic

About the security content of Safari 26.4 - Apple Support

https://support.apple.com/en-us/126800
generic

About the security content of visionOS 26.4 - Apple Support

https://support.apple.com/en-us/126799
generic

About the security content of watchOS 26.4 - Apple Support

https://support.apple.com/en-us/126798
generic

About the security content of tvOS 26.4 - Apple Support

https://support.apple.com/en-us/126797
generic

About the security content of macOS Tahoe 26.4 - Apple Support

https://support.apple.com/en-us/126794
generic

About the security content of iOS 26.4 and iPadOS 26.4 - Apple Support

https://support.apple.com/en-us/126792

Vendor Advisories for CVE-2026-28859(12)

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

Patch Availability(12)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuwebkitgtk-webdriver (2.52.3-0ubuntu0.26.04.2) @ resolute2026-06-30ubuntu
redhatwebkitgtk4-0:2.52.3-1.el7_92026-06-01redhat
redhatwebkit2gtk3-0:2.52.3-1.el9_02026-05-20redhat
redhatwebkit2gtk3-0:2.52.3-1.el9_82026-05-19redhat
redhatwebkit2gtk3-0:2.52.3-1.el9_22026-05-13redhat
redhatwebkit2gtk3-0:2.52.3-1.el8_42026-05-11redhat
redhatwebkit2gtk3-0:2.52.3-1.el9_42026-05-07redhat
redhatwebkit2gtk3-0:2.52.3-1.el8_62026-05-05redhat
redhatwebkit2gtk3-0:2.52.3-1.el8_82026-04-29redhat
redhatwebkit2gtk3-0:2.52.3-1.el9_62026-04-28redhat
redhatwebkit2gtk3-0:2.52.3-1.el8_102026-04-27redhat
redhatwebkit2gtk3-0:2.52.3-0.el9_7.12026-04-22redhat

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 ... 2.53.4-1 (161 versions)——
wpewebkit2.38.6-1 ... 2.52.5-1 (53 versions)——
Debian:13(2)
PackageVulnerable rangeFixed inDependents
webkit2gtk2.48.3-1 ... 2.52.3-1 (45 versions)2.52.3-2~deb13u1—
wpewebkit2.48.3-1 ... 2.52.5-1 (19 versions)——
Debian:14(2)
PackageVulnerable rangeFixed inDependents
webkit2gtk2.48.3-1 ... 2.52.0-1 (41 versions)2.52.1-1—
wpewebkit2.48.3-1 ... 2.52.0-1 (13 versions)2.52.1-1—

Weakness Classification(4)

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 7× in last 7d / 53× 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 115 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-28859?
CVE-2026-28859 is a medium vulnerability published on March 25, 2026. The issue was addressed with improved memory handling. This issue is fixed in Safari 26.4, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. A malicious website may be able to process restricted web content outside the sandbox.
When was CVE-2026-28859 disclosed?
CVE-2026-28859 was first published in the National Vulnerability Database on March 25, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-28859 actively exploited?
CVE-2026-28859 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 51.8% of all scored CVEs.
What is the CVSS score of CVE-2026-28859?
CVE-2026-28859 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-28859?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-28859, 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-2026-28859

Explore →

Is Your Infrastructure Affected by CVE-2026-28859?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs