CVE-2026-43747: Parsing a maliciously crafted file may lead to an unexpected app termination in Apple macOS
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Parsing a maliciously crafted file may lead to an unexpected app termination.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds read in Apple macOS that can be triggered by parsing a specially crafted file. The flaw could cause an application to terminate unexpectedly, impacting system availability. Apple fixed the issue by improving bounds checking in specific macOS versions: Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6. The CVSS vector indicates the attack requires local access with low complexity and no privileges, but user interaction is needed. The impact includes high confidentiality loss and high availability impact, with no integrity impact. No known exploits are reported in the wild.
Potential Impact
Successful exploitation may lead to unexpected application termination, causing denial of service and potential confidentiality impact. The vulnerability does not affect integrity. The CVSS score of 7.1 reflects high severity due to the combination of confidentiality and availability impacts.
Mitigation Recommendations
A fix is available in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6. Users and administrators should update affected systems to these or later versions to remediate the vulnerability. No additional mitigation guidance is provided or required.
CVE-2026-43747: Parsing a maliciously crafted file may lead to an unexpected app termination in Apple macOS
Description
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Parsing a maliciously crafted file may lead to an unexpected app termination.
CVSS v3.1
Score 7.1high
Affected software
Apple
macOS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds read in Apple macOS that can be triggered by parsing a specially crafted file. The flaw could cause an application to terminate unexpectedly, impacting system availability. Apple fixed the issue by improving bounds checking in specific macOS versions: Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6. The CVSS vector indicates the attack requires local access with low complexity and no privileges, but user interaction is needed. The impact includes high confidentiality loss and high availability impact, with no integrity impact. No known exploits are reported in the wild.
Potential Impact
Successful exploitation may lead to unexpected application termination, causing denial of service and potential confidentiality impact. The vulnerability does not affect integrity. The CVSS score of 7.1 reflects high severity due to the combination of confidentiality and availability impacts.
Mitigation Recommendations
A fix is available in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6. Users and administrators should update affected systems to these or later versions to remediate the vulnerability. No additional mitigation guidance is provided or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:21.647Z
- State
- PUBLISHED
Threat ID: 6a67c1b59c2644c7f8cb0e7e
Added to database: 07/27/2026, 20:38:13 UTC
Last enriched: 07/30/2026, 00:00:17 UTC
Last updated: 09/10/2026, 20:02:05 UTC
Views: 37
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