CVE-2026-43718: Processing maliciously crafted web content may lead to an unexpected Safari crash in Apple Safari
A stack overflow was addressed with improved input validation. 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 Safari crash.
AI Analysis
Technical Summary
CVE-2026-43718 is a stack overflow vulnerability in Apple Safari that may lead to an unexpected crash when processing maliciously crafted web content. The issue is resolved by improved input validation in Safari 26.5.2 and related OS versions including iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, and watchOS 26.6. The vulnerability has a CVSS v3.1 base score of 6.5, indicating a medium severity impact primarily affecting availability. There are no known exploits in the wild at this time.
Potential Impact
Successful exploitation of this vulnerability may cause Safari to crash unexpectedly, resulting in denial of service (availability impact). There is no indication of confidentiality or integrity impact. No known active exploitation has been reported.
Mitigation Recommendations
A fix is available 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 update affected Safari versions and operating systems to these fixed releases to remediate the vulnerability.
CVE-2026-43718: Processing maliciously crafted web content may lead to an unexpected Safari crash in Apple Safari
Description
A stack overflow was addressed with improved input validation. 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 Safari crash.
CVSS v3.1
Score 6.5medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-43718 is a stack overflow vulnerability in Apple Safari that may lead to an unexpected crash when processing maliciously crafted web content. The issue is resolved by improved input validation in Safari 26.5.2 and related OS versions including iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, and watchOS 26.6. The vulnerability has a CVSS v3.1 base score of 6.5, indicating a medium severity impact primarily affecting availability. There are no known exploits in the wild at this time.
Potential Impact
Successful exploitation of this vulnerability may cause Safari to crash unexpectedly, resulting in denial of service (availability impact). There is no indication of confidentiality or integrity impact. No known active exploitation has been reported.
Mitigation Recommendations
A fix is available 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 update affected Safari versions and operating systems to these fixed releases 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: 6a42d3d327e9c7971972d074
Added to database: 06/29/2026, 20:21:39 UTC
Last enriched: 07/30/2026, 00:56:15 UTC
Last updated: 08/10/2026, 00:41:16 UTC
Views: 60
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