CVE-2026-20639

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://support.apple.com/en-us/126348	Release Notes Vendor Advisory
https://support.apple.com/en-us/126795	Release Notes Vendor Advisory
https://support.apple.com/en-us/126796	Release Notes Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:apple:macos::::::::
	cpe:2.3:o:apple:macos::::::::
	cpe:2.3:o:apple:macos::::::::

History

17 Jun 2026, 10:17

Type	Values Removed	Values Added
Summary		(es) Se abordó un desbordamiento de entero con una validación de entrada mejorada. Este problema está solucionado en macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3. El procesamiento de una cadena creada con fines maliciosos puede provocar corrupción de la pila.

25 Mar 2026, 21:32

Type	Values Removed	Values Added
References	~~() https://support.apple.com/en-us/126348 -~~	() https://support.apple.com/en-us/126348 - Release Notes, Vendor Advisory
References	~~() https://support.apple.com/en-us/126795 -~~	() https://support.apple.com/en-us/126795 - Release Notes, Vendor Advisory
References	~~() https://support.apple.com/en-us/126796 -~~	() https://support.apple.com/en-us/126796 - Release Notes, Vendor Advisory
CPE		cpe:2.3:o:apple:macos::::::::
First Time		Apple macos Apple

25 Mar 2026, 20:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
CWE		CWE-190

25 Mar 2026, 01:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-25 01:17

Updated : 2026-06-17 10:17

NVD link : CVE-2026-20639

Mitre link : CVE-2026-20639

CVE.ORG link : CVE-2026-20639

JSON object : View

Products Affected

apple

macos

CWE

CWE-190

Integer Overflow or Wraparound

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