CVE-2026-28859
Medium
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.
SeverityMedium
CVSS4.3
Exploit probability—
Product
Apple Safari
PublishedMar 25, 2026
First seenMar 25, 2026
How to fix
Update
- apple safari26.4 or later
- apple ipados26.4 or later
- apple iphone_os26.4 or later
- apple macos26.4 or later
- apple tvos26.4 or later
- apple visionos26.4 or later
- apple watchos26.4 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2026:22136
- access.redhat.com/errata/RHSA-2026:10702
- access.redhat.com/errata/RHSA-2026:16056
- access.redhat.com/errata/RHSA-2026:13845
- access.redhat.com/errata/RHSA-2026:11814
- access.redhat.com/errata/RHSA-2026:19535
- access.redhat.com/errata/RHSA-2026:16695
- access.redhat.com/errata/RHSA-2026:14659
- access.redhat.com/errata/RHSA-2026:11329
- access.redhat.com/errata/RHSA-2026:9692
- access.redhat.com/errata/RHSA-2026:19206
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apple safari | v < 26.4 | 26.4 |
| apple ipados | v < 26.4 | 26.4 |
| apple iphone_os | v < 26.4 | 26.4 |
| apple macos | v < 26.4 | 26.4 |
| apple tvos | v < 26.4 | 26.4 |
| apple visionos | v < 26.4 | 26.4 |
| apple watchos | v < 26.4 | 26.4 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.