CVE-2026-86907: An app with admin privileges may be able to modify the System Keychain in Apple macOS
Description
CVE-2026-86907 is an authorization vulnerability in Apple macOS where an app with admin privileges could modify the System Keychain. The issue was addressed by improving entitlement checks and fixed in macOS Sequoia 15.8 and macOS Tahoe 26.7.
Affected software
Apple
macOS
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an authorization issue in macOS that allowed applications with administrative privileges to modify the System Keychain. Apple fixed this by enhancing entitlement checks to prevent unauthorized modifications. The flaw affects versions prior to macOS Sequoia 15.8 and macOS Tahoe 26.7.
Potential Impact
An application running with admin privileges could potentially modify the System Keychain, which may lead to unauthorized access or manipulation of sensitive credentials stored within the keychain. This could undermine system security and trust in stored secrets.
Mitigation Recommendations
Apple has released official fixes in macOS Sequoia 15.8 and macOS Tahoe 26.7. Users and administrators should update to these versions or later to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-09-08T16:43:41.874Z
- State
- PUBLISHED
Threat ID: 6ad6c19b2cdf04f656e4a8ae
Added to database: 10/20/2026, 01:19:23 UTC
Last enriched: 10/20/2026, 01:49:03 UTC
Last updated: 10/20/2026, 01:49:03 UTC
Views: 3
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