CVE-2026-86929

macOS Out-of-Bounds Write Allows Arbitrary Code Execution

Published Oct 26, 2026 CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Description
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. Processing a maliciously crafted file may lead to arbitrary code execution.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Title macOS Out-of-Bounds Write Allows Arbitrary Code Execution
Type Values Removed Values Added
Title Out‑of‑Bounds Write Allowing Arbitrary Code Execution via Malicious File
Weaknesses CWE-788
Type Values Removed Values Added
Title Out‑of‑Bounds Write Allowing Arbitrary Code Execution via Malicious File
First Time appeared Apple
Apple macos
Weaknesses CWE-125
CWE-788
Vendors & Products Apple
Apple macos
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. Processing a maliciously crafted file may lead to arbitrary code execution.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apple
Published
Updated
Oct 27, 2026, 3:56 AM
Reserved
Sep 8, 2026, 4:43 PM
Status
Analyzed
Published
Oct 26, 2026, 9:20 PM
Modified
Oct 28, 2026, 3:31 PM