CVE-2026-43700: Processing maliciously crafted web content may disclose sensitive user information in Apple Safari
A cross-origin issue was addressed with improved tracking of security origins. 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 disclose sensitive user information.
AI Analysis
Technical Summary
CVE-2026-43700 is a cross-origin issue in Apple Safari where improper tracking of security origins could lead to disclosure of sensitive user information when processing maliciously crafted web content. The vulnerability affects Safari versions prior to 26.5.2 and related Apple operating systems. The issue was resolved by enhancing the tracking of security origins to prevent unauthorized data disclosure.
Potential Impact
An attacker could exploit this vulnerability by delivering malicious web content that causes Safari to disclose sensitive user information across origins. The confidentiality of user data is impacted, but integrity and availability are not affected. There are no known active exploits in the wild.
Mitigation Recommendations
This vulnerability is fixed in Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, and watchOS 26.6. Users and administrators should update affected Apple software to these versions or later to remediate the issue. Patch status is confirmed by the vendor advisory. No additional mitigations are specified.
CVE-2026-43700: Processing maliciously crafted web content may disclose sensitive user information in Apple Safari
Description
A cross-origin issue was addressed with improved tracking of security origins. 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 disclose sensitive user information.
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
CVE-2026-43700 is a cross-origin issue in Apple Safari where improper tracking of security origins could lead to disclosure of sensitive user information when processing maliciously crafted web content. The vulnerability affects Safari versions prior to 26.5.2 and related Apple operating systems. The issue was resolved by enhancing the tracking of security origins to prevent unauthorized data disclosure.
Potential Impact
An attacker could exploit this vulnerability by delivering malicious web content that causes Safari to disclose sensitive user information across origins. The confidentiality of user data is impacted, but integrity and availability are not affected. There are no known active exploits in the wild.
Mitigation Recommendations
This vulnerability is fixed in Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, and watchOS 26.6. Users and administrators should update affected Apple software to these versions or later to remediate the issue. Patch status is confirmed by the vendor advisory. No additional mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:21.643Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a42d3d227e9c7971972ceb2
Added to database: 06/29/2026, 20:21:38 UTC
Last enriched: 07/30/2026, 00:54:22 UTC
Last updated: 08/11/2026, 12:41:10 UTC
Views: 74
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.