CVE-2026-20635 Details
Description
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. Processing maliciously crafted web content may lead to an unexpected process crash.
A denial-of-service vulnerability has been identified in the WebKit component of various Apple operating systems, including iOS, iPadOS, macOS Tahoe, tvOS, watchOS, and visionOS. This vulnerability allows a remote attacker to cause an unexpected process crash by exploiting maliciously crafted web content. The issue arises from improper memory handling, which can lead to a process crash.
This vulnerability has been fixed in the latest versions of the affected operating systems: iOS 26.3, iPadOS 26.3, macOS Tahoe 26.3, tvOS 26.3, watchOS 26.3, and visionOS 26.3.
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 Feb 12, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | CISA-ADP |
| CWE-120 | Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') | redhat-SADP |
Affected Products
| Product | Versions |
|---|---|
| apple safari | < 26.3 |
CPE
Remediation
| |
| apple ipados | < 18.7.5 >= 26.0, < 26.3 |
CPE
Remediation
| |
| apple iphone os | < 18.7.5 >= 26.0, < 26.3 |
CPE
Remediation
| |
| apple macos | < 26.3 |
CPE
Remediation
| |
| apple tvos | < 26.3 |
CPE
Remediation
| |
| apple visionos | < 26.3 |
CPE
Remediation
| |
| apple watchos | < 26.3 |
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 |
| Apr 2, 2026 | CVE Modified | [email protected] |
| Feb 12, 2026 | Initial Analysis | [email protected] |
| Feb 12, 2026 | CVE Modified | CISA-ADP |
| Feb 11, 2026 | New CVE Received | [email protected] |