CVE-2026-43818: 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. Proc

highCVSS 8.8CVE-2026-43818

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.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 8.8
Published: 2026-07-27
Last updated: 2026-07-29
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-43818

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-438180.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 32% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-43818	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[NEW] [medium] Apple iOS and iPadOS: Multiple vulnerabilitiescert-bund
unknownNCSC-2026-0266 [1.00] [M/H] Vulnerabilities fixed in Apple iOS and iPadOSncsc-nl

Recent advisories for An integer overflow

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-65423: An integer overflow in the UA_Variant arrayDimensions product computation in open62541 may all…nvd · 2026-07-30
highCVE-2026-63559: An integer overflow in the UA_Variant arrayDimensions product computation in open62541 may all…nvd · 2026-07-30
highCVE-2026-16529: A signed integer overflow in the PCP __pmGetPDU() function can be exploited via crafted networ…nvd · 2026-07-30
highCVE-2026-17881: Integer overflow in WebXR in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to…nvd · 2026-07-30
criticalCVE-2026-17848: Integer overflow in Codecs in Google Chrome prior to 151.0.7922.72 allowed a remote attacker t…nvd · 2026-07-30
criticalCVE-2026-17726: Integer overflow in WebGL in Google Chrome on Android prior to 151.0.7922.72 allowed a remote …nvd · 2026-07-30