CVE-2026-43708: A malicious website may exfiltrate data cross-origin in Apple Safari
The issue 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. A malicious website may exfiltrate data cross-origin.
AI Analysis
Technical Summary
CVE-2026-43708 is a medium severity vulnerability in Apple Safari browsers before version 26.5.2. The flaw involves improper input validation that enables a malicious website to perform cross-origin data exfiltration. This issue affects Safari on iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS. Apple fixed the vulnerability by enhancing input validation in Safari 26.5.2 and related OS updates. There are no known exploits in the wild, and the vulnerability is identified under CWE-20 (Improper Input Validation).
Potential Impact
A malicious website could exploit this vulnerability to exfiltrate data across origins, potentially leading to unauthorized disclosure of sensitive information. The impact is limited to confidentiality loss without integrity or availability effects. No known active exploitation has been reported.
Mitigation Recommendations
Apple has released fixes in Safari 26.5.2 and corresponding OS versions (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 Apple platforms to these versions or later to remediate the vulnerability. Patch status is confirmed by the vendor advisory.
CVE-2026-43708: A malicious website may exfiltrate data cross-origin in Apple Safari
Description
The issue 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. A malicious website may exfiltrate data cross-origin.
CVSS v3.1
Score 4.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-43708 is a medium severity vulnerability in Apple Safari browsers before version 26.5.2. The flaw involves improper input validation that enables a malicious website to perform cross-origin data exfiltration. This issue affects Safari on iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS. Apple fixed the vulnerability by enhancing input validation in Safari 26.5.2 and related OS updates. There are no known exploits in the wild, and the vulnerability is identified under CWE-20 (Improper Input Validation).
Potential Impact
A malicious website could exploit this vulnerability to exfiltrate data across origins, potentially leading to unauthorized disclosure of sensitive information. The impact is limited to confidentiality loss without integrity or availability effects. No known active exploitation has been reported.
Mitigation Recommendations
Apple has released fixes in Safari 26.5.2 and corresponding OS versions (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 Apple platforms to these versions or later to remediate the vulnerability. Patch status is confirmed by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:21.644Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a42d3d227e9c7971972cf07
Added to database: 06/29/2026, 20:21:38 UTC
Last enriched: 07/30/2026, 00:55:20 UTC
Last updated: 08/12/2026, 12:41:09 UTC
Views: 56
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.