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. Processing maliciously crafted web content may lead to an unexpected Safari crash.
AI Analysis
Technical Summary
This vulnerability involves a stack overflow in Apple Safari triggered by processing specially crafted web content. The flaw was mitigated by enhancing input validation to prevent the overflow condition. The fix is included in Safari 26.5.2 and corresponding updates for iOS, iPadOS, and macOS Tahoe.
Potential Impact
An attacker could cause Safari to crash unexpectedly by delivering malicious web content. This results in a denial of service condition for the user. There is no indication of code execution or data compromise from the provided information.
Mitigation Recommendations
Apply the official update to Safari 26.5.2 or later, as well as iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2 where applicable. This update contains the fix through improved input validation. Patch status is confirmed by the vendor advisory information.
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. Processing maliciously crafted web content may lead to an unexpected Safari crash.
CVSS v3.1
Score 6.5medium
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a stack overflow in Apple Safari triggered by processing specially crafted web content. The flaw was mitigated by enhancing input validation to prevent the overflow condition. The fix is included in Safari 26.5.2 and corresponding updates for iOS, iPadOS, and macOS Tahoe.
Potential Impact
An attacker could cause Safari to crash unexpectedly by delivering malicious web content. This results in a denial of service condition for the user. There is no indication of code execution or data compromise from the provided information.
Mitigation Recommendations
Apply the official update to Safari 26.5.2 or later, as well as iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2 where applicable. This update contains the fix through improved input validation. Patch status is confirmed by the vendor advisory information.
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: 06/29/2026, 20:37:48 UTC
Last updated: 06/29/2026, 22:06:43 UTC
Views: 2
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.