CVE-2026-20639

An integer overflow was addressed with improved input validation

High · published March 25, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
49.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00622 · 49.1th percentile
Published
2026-03-25T00:32Z
EPSS history
Timeline
  • 25 MAR 00:32Z
    An integer overflow was addressed with improved input validation
    cvelistv5