CVE-2026-43727: Processing maliciously crafted web content may lead to an unexpected Safari crash in Apple Safari
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected Safari crash.
AI Analysis
Technical Summary
This vulnerability is a use-after-free issue (CWE-416) in Apple Safari that can be triggered by processing specially crafted web content, leading to an unexpected crash of the browser. The flaw was resolved by improving memory management in Safari 26.5.2 and related OS updates (iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, visionOS 26.6, watchOS 26.6). There is no indication of known exploits in the wild. The CVSS 3.1 vector indicates the attack requires network access, no privileges, user interaction, and results in availability impact only.
Potential Impact
Successful exploitation causes an unexpected crash of Safari, resulting in denial of service (availability impact). There is no impact on confidentiality or integrity according to the CVSS vector. No known active exploits have been reported.
Mitigation Recommendations
A fix is available in Safari 26.5.2 and corresponding OS versions (iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, visionOS 26.6, watchOS 26.6). Users and administrators should update affected Safari browsers and operating systems to these versions or later to remediate the vulnerability.
CVE-2026-43727: Processing maliciously crafted web content may lead to an unexpected Safari crash in Apple Safari
Description
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected Safari crash.
CVSS v3.1
Score 6.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a use-after-free issue (CWE-416) in Apple Safari that can be triggered by processing specially crafted web content, leading to an unexpected crash of the browser. The flaw was resolved by improving memory management in Safari 26.5.2 and related OS updates (iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, visionOS 26.6, watchOS 26.6). There is no indication of known exploits in the wild. The CVSS 3.1 vector indicates the attack requires network access, no privileges, user interaction, and results in availability impact only.
Potential Impact
Successful exploitation causes an unexpected crash of Safari, resulting in denial of service (availability impact). There is no impact on confidentiality or integrity according to the CVSS vector. No known active exploits have been reported.
Mitigation Recommendations
A fix is available in Safari 26.5.2 and corresponding OS versions (iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, visionOS 26.6, watchOS 26.6). Users and administrators should update affected Safari browsers and operating systems to these versions or later to remediate the vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:21.645Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a42d3d427e9c7971972d149
Added to database: 06/29/2026, 20:21:40 UTC
Last enriched: 07/30/2026, 00:57:08 UTC
Last updated: 08/13/2026, 00:41:12 UTC
Views: 91
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.