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6.5 — HIGH

macOS flaw lets malware replace trusted apps without security warnings

📅 23 July 2026 at 17:16 UTC📰 Cyber InsiderView original source ↗
macOS flaw lets malware replace trusted apps without security warnings

Security researchers Talal Haj Bakry and Tommy Mysk have disclosed a macOS weakness that allows malware already running under a user's account to silently replace the executable of trusted applications downloaded from the web and relaunch them without triggering Gatekeeper warnings. Although the technique does not bypass macOS security protections, it can cause legitimate permission … The post macOS flaw lets malware replace trusted apps without security warnings appeared first on CyberInsider.

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

A macOS flaw allows malware to replace the executable of trusted applications without triggering security warnings, potentially convincing users to grant access to sensitive data. The vulnerability does not bypass Gatekeeper or TCC protections but can cause legitimate permission dialogs to display the trusted application's name and icon.

⚙️Technical Details
Affected Systems
macOS Tahoe 26.x and Golden Gate beta releases
Attack Vectors
archive-and-restore trick using code execution privileges as the logged-in user
💥Impact Assessment
Severity: high
Who Is at Risk
Users of macOS outside the Mac App Store who have already launched applications at least once, particularly those with sensitive data or Keychain access
🛡️Recommended Actions
1Regularly review and approve permission requests for sensitive files or Keychain data
2Use a secure password manager to protect Keychain data
3Keep software up-to-date with the latest security patches
📦Affected Products
Software:macOS Tahoe 26.xGolden Gate beta releaseHardware: None

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