CVE-2026-20664
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, visionOS 26.4. Processing maliciously crafted web content may lead to an unexpected process crash.
SeverityMedium
CVSS4.3
Exploit probability—
Product
Apple Safari
PublishedMar 25, 2026
First seenMar 25, 2026
Weakness typeCWE-787Out-of-bounds writeCWE-120CWE-120
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 visionos26.4 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 | 26.0 ≤ v < 26.4 | 26.4 |
| apple visionos | v < 26.4 | 26.4 |
Check your version
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