CVE-2026-28859 Details
Description
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.
A vulnerability in WebKit, the engine used by Safari, has been identified that allows a malicious website to process restricted web content outside of its designated sandbox. This issue could potentially be exploited to access or manipulate data in ways that are normally restricted.
This vulnerability has been fixed in Safari 26.4, as well as in the latest versions of iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS. Users should update to these versions to address the vulnerability.
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 25, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-120 | Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') | redhat-SADP |
| CWE-125 | Out-of-bounds Read | CISA-ADP |
| CWE-416 | Use After Free | CISA-ADP |
| CWE-787 | Out-of-bounds Write | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| apple safari | < 26.4 |
CPE
Remediation
| |
| apple ipados | < 26.4 |
CPE
Remediation
| |
| apple iphone os | < 26.4 |
CPE
Remediation
| |
| apple macos | < 26.4 |
CPE
Remediation
| |
| apple tvos | < 26.4 |
CPE
Remediation
| |
| apple visionos | < 26.4 |
CPE
Remediation
| |
| apple watchos | < 26.4 |
CPE
Remediation
| |
Change History
7 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 |
| Mar 25, 2026 | Initial Analysis | [email protected] |
| Mar 25, 2026 | CVE Modified | CISA-ADP |
| Mar 25, 2026 | New CVE Received | [email protected] |