CVE-2026-43818

HIGH

8.8

CVSS Score

Published: July 27, 2026 at 08:13 PM UTC

Updated: August 17, 2026 at 10:34 PM UTC

3 products affected across 1 vendormacOSiPhone OSiPadOS

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Severity

HIGH8.8

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

iPadOS · Apple

95%

v < 18.7.10v < 26.6

Affected range stops below 18.7.10, so it looks safe — our inference, not a vendor statement

Affected range stops below 26.6, so it looks safe — our inference, not a vendor statement

iPhone OS · Apple

95%

v < 26.6

Affected range stops below 26.6, so it looks safe — our inference, not a vendor statement

macOS · Apple

95%

v < 14.8.8v < 15.7.8v < 26.614.0 ≤ v < 14.8.815.0 ≤ v < 15.7.826.0 ≤ v < 26.6

Affected range stops below 14.8.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.7.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 26.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (5)

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/128066

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/128067

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/128071

Release NotesVendor Advisory

Source: cverecord

https://support.apple.com/en-us/128072

Source: cverecord

https://support.apple.com/en-us/148287

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-190

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