CVE-2026-43818 | An integer overflow was addressed with improved input valida… | CVSS 8.8 HIGH

Description

An integer overflow was addressed with improved input validation. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Processing a maliciously crafted image may lead to arbitrary code execution.

Metadata

CVE ID: CVE-2026-43818
State: PUBLISHED
Assigner: apple
Reserved: 2026-05-01 22:46 UTC
Published: 2026-07-27 20:13 UTC
Last updated: 2026-07-29 03:55 UTC
Primary CWE: CWE-190
CWE-190 Integer Overflow or Wraparound
Vendor / Product: Apple / iOS and iPadOS
Sources: cve.org · NVD

Severity & Metrics

8.8 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: total

Affected products (2)

Vendor	Product	Platform	Versions
Apple	iOS and iPadOS	—	0 < 26.6
Apple	macOS	—	0 < 14.8.8, 0 < 15.7.8, 0 < 26.6

Weakness (CWE)

CWE	Source	Description
—	cna	Processing a maliciously crafted image may lead to arbitrary code execution
CWE-190	adp	CWE-190 Integer Overflow or Wraparound

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.8	HIGH	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References (4)