CVE-2026-43735: A malicious website may exfiltrate data cross-origin in Apple Safari
The issue was addressed with improved checks. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. A malicious website may exfiltrate data cross-origin.
AI Analysis
Technical Summary
This vulnerability in Apple Safari enables a malicious website to perform cross-origin data exfiltration due to insufficient checks. Apple fixed the issue by improving these checks in Safari 26.5.2 and corresponding OS versions (iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2). The vulnerability allows unauthorized access to data from other origins, violating the same-origin policy. No CVSS score is available, and no public exploits are known at this time.
Potential Impact
The impact of this vulnerability is unauthorized cross-origin data exfiltration, which can lead to leakage of sensitive information from websites visited by the user. This compromises user privacy and data security within the affected browser environment.
Mitigation Recommendations
A fix is available and has been released by Apple in Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2. Users and administrators should update to these versions or later to mitigate the vulnerability. No additional mitigation guidance is provided or required beyond applying the official update.
CVE-2026-43735: A malicious website may exfiltrate data cross-origin in Apple Safari
Description
The issue was addressed with improved checks. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. A malicious website may exfiltrate data cross-origin.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Apple Safari enables a malicious website to perform cross-origin data exfiltration due to insufficient checks. Apple fixed the issue by improving these checks in Safari 26.5.2 and corresponding OS versions (iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2). The vulnerability allows unauthorized access to data from other origins, violating the same-origin policy. No CVSS score is available, and no public exploits are known at this time.
Potential Impact
The impact of this vulnerability is unauthorized cross-origin data exfiltration, which can lead to leakage of sensitive information from websites visited by the user. This compromises user privacy and data security within the affected browser environment.
Mitigation Recommendations
A fix is available and has been released by Apple in Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2. Users and administrators should update to these versions or later to mitigate the vulnerability. No additional mitigation guidance is provided or required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:21.646Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a42d3d427e9c7971972d15d
Added to database: 06/29/2026, 20:21:40 UTC
Last enriched: 06/29/2026, 20:37:01 UTC
Last updated: 06/29/2026, 21:25:12 UTC
Views: 3
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.