CVE-2026-20639

EUVD-2026-15043
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA-ADPADP
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Affected Products (NVD)
VendorProductVersion
applemacos
14.0 ≤
𝑥
< 14.8.5
applemacos
15.0 ≤
𝑥
< 15.7.5
applemacos
26.0 ≤
𝑥
< 26.3
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://support.apple.com/en-us/126348
https://support.apple.com/en-us/126795
https://support.apple.com/en-us/126796