CVE-2026-64778: Visiting a maliciously crafted website may leak sensitive data in Apple Safari
The issue was addressed with improved checks. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, watchOS 27. Visiting a maliciously crafted website may leak sensitive data.
AI Analysis
Technical Summary
CVE-2026-64778 is a data leakage vulnerability in Apple Safari where visiting a maliciously crafted website may result in sensitive data exposure. The issue was resolved by Apple through improved checks and is fixed in Safari 26.6.1, iOS 18.7.10, iPadOS 18.7.10, iOS 26.6.1, iPadOS 26.6.1, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, and watchOS 27. The vulnerability is identified as CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor).
Potential Impact
An attacker controlling a malicious website could cause Safari users to leak sensitive data without requiring privileges or authentication. The confidentiality of data is impacted, but integrity and availability are not affected. The CVSS vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, and high confidentiality impact.
Mitigation Recommendations
Users and administrators should update Safari and the affected Apple operating systems to the fixed versions: Safari 26.6.1, iOS 18.7.10, iPadOS 18.7.10, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, and watchOS 27. Applying these official fixes fully mitigates the vulnerability.
CVE-2026-64778: Visiting a maliciously crafted website may leak sensitive data in Apple Safari
Description
The issue was addressed with improved checks. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, watchOS 27. Visiting a maliciously crafted website may leak sensitive data.
CVSS v3.1
Score 6.5medium
Affected software
Apple
Safari
Apple
iOS and iPadOS
Apple
macOS
Apple
tvOS
Apple
visionOS
Apple
watchOS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-64778 is a data leakage vulnerability in Apple Safari where visiting a maliciously crafted website may result in sensitive data exposure. The issue was resolved by Apple through improved checks and is fixed in Safari 26.6.1, iOS 18.7.10, iPadOS 18.7.10, iOS 26.6.1, iPadOS 26.6.1, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, and watchOS 27. The vulnerability is identified as CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor).
Potential Impact
An attacker controlling a malicious website could cause Safari users to leak sensitive data without requiring privileges or authentication. The confidentiality of data is impacted, but integrity and availability are not affected. The CVSS vector indicates network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, and high confidentiality impact.
Mitigation Recommendations
Users and administrators should update Safari and the affected Apple operating systems to the fixed versions: Safari 26.6.1, iOS 18.7.10, iPadOS 18.7.10, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, and watchOS 27. Applying these official fixes fully mitigates the vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-07-20T18:10:53.025Z
- State
- PUBLISHED
Threat ID: 6a838032bf8831d5399e4780
Added to database: 08/17/2026, 21:42:10 UTC
Last enriched: 09/19/2026, 00:51:20 UTC
Last updated: 10/02/2026, 02:46:05 UTC
Views: 51
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.