CVE-2026-86874: Input Validation
Published Oct 20, 2026
·Updated
An out-of-bounds read was addressed with improved input validation. This issue is fixed in Xcode 27. Parsing a maliciously crafted binary may lead to unexpected tool termination.
Affected Software
1 affected component
Apple Xcode<27
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Xcodeto a version that resolves this vulnerability.Fixed in 27
Event History
Oct 20, 2026
CVE Published
via MITRE·12:50 AM
Data Sourced
via MITRE·12:50 AM
DescriptionWeakness
Data Sourced
via NVD·01:17 AM
Description
Frequently Asked Questions
1
What must an attacker provide to trigger this issue?
The issue is triggered when Xcode parses a maliciously crafted binary.
2
What is the likely impact of successful exploitation?
Parsing the crafted binary may cause an unexpected tool termination, consistent with a denial-of-service impact.
3
Which version includes the fix?
Apple fixed the issue in Xcode 27.