CVE-2026-43663: Processing maliciously crafted web content may lead to an unexpected process crash in Apple Safari
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected process crash.
AI Analysis
Technical Summary
CVE-2026-43663 is a vulnerability in Apple Safari where processing maliciously crafted web content can lead to an unexpected process crash due to improper memory handling. The issue is linked to memory safety weaknesses (CWE-416, CWE-119). Apple fixed this vulnerability in Safari 26.5.2 and related OS versions (iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6). The CVSS v3.1 base score is 6.5, reflecting a medium severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impact limited to availability.
Potential Impact
Successful exploitation causes an unexpected process crash in Safari, impacting availability of the browser process. There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
Apple has released fixes in Safari 26.5.2 and corresponding OS updates (iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6). Users and administrators should apply these updates to remediate the vulnerability. Patch status is confirmed by the vendor advisory. No additional mitigations are indicated.
CVE-2026-43663: Processing maliciously crafted web content may lead to an unexpected process crash in Apple Safari
Description
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected process crash.
CVSS v3.1
Score 6.5medium
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-43663 is a vulnerability in Apple Safari where processing maliciously crafted web content can lead to an unexpected process crash due to improper memory handling. The issue is linked to memory safety weaknesses (CWE-416, CWE-119). Apple fixed this vulnerability in Safari 26.5.2 and related OS versions (iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6). The CVSS v3.1 base score is 6.5, reflecting a medium severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impact limited to availability.
Potential Impact
Successful exploitation causes an unexpected process crash in Safari, impacting availability of the browser process. There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
Apple has released fixes in Safari 26.5.2 and corresponding OS updates (iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6). Users and administrators should apply these updates to remediate the vulnerability. Patch status is confirmed by the vendor advisory. No additional mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:21.639Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a42d3d027e9c7971972c7b0
Added to database: 06/29/2026, 20:21:36 UTC
Last enriched: 07/30/2026, 00:54:03 UTC
Last updated: 08/10/2026, 12:41:11 UTC
Views: 78
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