CVE-2026-20639

HIGH

macOS <14.8.5 - Memory Corruption

Title source: llm
STIX 2.1

Description

An integer overflow was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3. Processing a maliciously crafted string may lead to heap corruption.

Scores

CVSS v3 7.5
EPSS 0.0006
EPSS Percentile 17.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-190
Status published
Products (4)
Apple/macOS < 14.8.5
Apple/macOS < 15.7.5
Apple/macOS < 26.3
apple/macos 14.0 - 14.8.5
Published Mar 25, 2026
Tracked Since Mar 25, 2026