CVE-2026-20639

CWE-190 — Integer Overflow5 documents5 sources
Severity
7.5HIGH
EPSS
0.1%
top 83.63%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Apple Macos
Timeline
PublishedMar 25

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶CVEListV5apple/macos< 14.8.5+2
▶NVDapple/macos14.0 — 14.8.5+2

🔴Vulnerability Details

2
GHSA
GHSA-7gg2-3r7f-v522: An integer overflow was addressed with improved input validation↗2026-03-25
▶
CVEList
CVE-2026-20639: An integer overflow was addressed with improved input validation↗2026-03-25
▶

📋Vendor Advisories

1
Apple
CVE-2026-20639: macOS Tahoe 26.3↗2026-02-11
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-20639 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-20639 (HIGH CVSS 7.5) | An integer overflow was addressed w | cvebase.io