CVE-2026-28861

webkitgtk: A malicious website may be able to access script message handlers intended for other origins

Published Mar 25, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Description
A logic issue was addressed with improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. A malicious website may be able to access script message handlers intended for other origins.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-6232-1 webkit2gtk security update
Ubuntu USN Ubuntu USN USN-8237-1 WebKitGTK vulnerabilities
History
Type Values Removed Values Added
Weaknesses CWE-79
Type Values Removed Values Added
Weaknesses CWE-200
Type Values Removed Values Added
Title Cross-Origin Script Message Handler Access in Safari, iOS, macOS, and visionOS webkitgtk: A malicious website may be able to access script message handlers intended for other origins
Weaknesses CWE-346
References
Metrics threat_severity

None

threat_severity

Important

Type Values Removed Values Added
Title Cross-Origin Script Message Handler Access in Safari, iOS, macOS, and visionOS
Weaknesses CWE-200
Type Values Removed Values Added
Title Cross‑Origin Script Message Handler Exposure in Apple Safari and Related Platforms.
Weaknesses CWE-200
Type Values Removed Values Added
Title Cross‑Origin Script Message Handler Exposure in Apple Safari and Related Platforms.
Weaknesses CWE-200
Type Values Removed Values Added
First Time appeared Apple ipados
Apple iphone Os
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*
Vendors & Products Apple ipados
Apple iphone Os
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Cross‑Origin Script Message Handler Access in Safari and Apple Operating Systems
Weaknesses CWE-200
Type Values Removed Values Added
Title Cross‑Origin Script Message Handler Access in Safari and Apple Operating Systems
Weaknesses CWE-200
Type Values Removed Values Added
First Time appeared Apple
Apple ios And Ipados
Apple macos
Apple safari
Apple visionos
Vendors & Products Apple
Apple ios And Ipados
Apple macos
Apple safari
Apple visionos
Type Values Removed Values Added
Description A logic issue was addressed with improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. A malicious website may be able to access script message handlers intended for other origins.
References

Sources

Status
PUBLISHED
Assigner
apple
Published
Updated
Oct 26, 2026, 8:37 PM
Reserved
Mar 3, 2026, 4:36 PM
Status
Modified
Published
Mar 25, 2026, 1:17 AM
Modified
Jul 15, 2026, 2:19 AM
Severity
Important
Public date
Mar 28, 2026, 8:00 PM