CVE-2026-28861 Details
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.
A logic vulnerability in WebKit, the engine powering Safari, was addressed with improved state management. This issue allows a malicious website to access script message handlers meant for other origins, potentially leading to cross-origin information leakage. The vulnerability is present in WebKit components of Safari, iOS, iPadOS, macOS Tahoe, and visionOS, all in version 26.4.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 26, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-28861 | redhat-SADP | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2453007 | redhat-SADP | |
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28861.json | redhat-SADP | |
| https://support.apple.com/en-us/126792 | [email protected] | Release NotesVendor Advisory |
| https://support.apple.com/en-us/126793 | [email protected] | Release NotesVendor Advisory |
| https://support.apple.com/en-us/126794 | [email protected] | Release NotesVendor Advisory |
| https://support.apple.com/en-us/126799 | [email protected] | Release NotesVendor Advisory |
| https://support.apple.com/en-us/126800 | [email protected] | Release NotesVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
| CWE-346 | Origin Validation Error | redhat-SADP |
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| apple safari | < 26.4 |
CPE
Remediation
| |
| apple ipados | < 18.7.7 >= 26.0, < 26.4 |
CPE
Remediation
| |
| apple iphone os | < 18.7.7 >= 26.0, < 26.4 |
CPE
Remediation
| |
| apple macos | < 26.4 |
CPE
Remediation
| |
| apple visionos | < 26.4 |
CPE
Remediation
| |
Change History
8 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 15, 2026 | CVE Modified | redhat-SADP |
| Jun 30, 2026 | CVE Modified | redhat-SADP |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 10, 2026 | CVE Modified | CISA-ADP |
| Mar 26, 2026 | Initial Analysis | [email protected] |
| Mar 26, 2026 | CVE Modified | CISA-ADP |
| Mar 25, 2026 | New CVE Received | [email protected] |