CVE-2026-43771: An app may be able to cause a denial-of-service in Apple macOS
A stack overflow was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to cause a denial-of-service.
AI Analysis
Technical Summary
CVE-2026-43771 is a stack overflow vulnerability in Apple macOS that may be exploited by a local application to cause a denial-of-service (DoS). The flaw was mitigated by enhancing input validation. The vendor fixed this issue in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6. The CVSS 3.1 base score is 7.1, reflecting high severity with local attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, high confidentiality impact, no integrity impact, and high availability impact.
Potential Impact
An attacker with local access and the ability to execute an app could trigger a stack overflow leading to a denial-of-service, potentially causing system instability or crash. There is no indication of confidentiality or integrity compromise beyond the stated impact. No known exploits are reported in the wild.
Mitigation Recommendations
Apply the official patches by upgrading to macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, or macOS Tahoe 26.6 as these versions contain the fix for this vulnerability. No other mitigation or temporary workaround is indicated.
CVE-2026-43771: An app may be able to cause a denial-of-service in Apple macOS
Description
A stack overflow was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to cause a denial-of-service.
CVSS v3.1
Score 7.1high
Affected software
Apple
macOS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-43771 is a stack overflow vulnerability in Apple macOS that may be exploited by a local application to cause a denial-of-service (DoS). The flaw was mitigated by enhancing input validation. The vendor fixed this issue in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6. The CVSS 3.1 base score is 7.1, reflecting high severity with local attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, high confidentiality impact, no integrity impact, and high availability impact.
Potential Impact
An attacker with local access and the ability to execute an app could trigger a stack overflow leading to a denial-of-service, potentially causing system instability or crash. There is no indication of confidentiality or integrity compromise beyond the stated impact. No known exploits are reported in the wild.
Mitigation Recommendations
Apply the official patches by upgrading to macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, or macOS Tahoe 26.6 as these versions contain the fix for this vulnerability. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:27.818Z
- State
- PUBLISHED
Threat ID: 6a67c1b89c2644c7f8cb0f5d
Added to database: 07/27/2026, 20:38:16 UTC
Last enriched: 07/30/2026, 00:00:29 UTC
Last updated: 09/11/2026, 07:31:53 UTC
Views: 62
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