CVE-2026-28861
Cross-Origin Script Message Handler Access in Safari and iOS
Publication date: 2026-03-25
Last updated on: 2026-03-26
Assigner: Apple Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| apple | ipados | to 18.7.7 (exc) |
| apple | ipados | From 26.0 (inc) to 26.4 (exc) |
| apple | iphone_os | to 18.7.7 (exc) |
| apple | iphone_os | From 26.0 (inc) to 26.4 (exc) |
| apple | visionos | to 26.4 (exc) |
| apple | macos | to 26.4 (exc) |
| apple | safari | to 26.4 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a logic issue related to state management in certain Apple operating systems and Safari browser versions. It allows a malicious website to potentially access script message handlers that are intended for other origins, which means that scripts from one website could interfere with or access data from another website.
How can this vulnerability impact me? :
The impact of this vulnerability is that a malicious website could exploit it to access script message handlers meant for other websites. This could lead to unauthorized access to information or interference between websites, potentially compromising user data or security when browsing.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, update affected Apple software to the fixed versions: Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, and visionOS 26.4.