CVE intelligence

CVE-2026-4739

Vulnerability intelligence

Published Mar 24, 2026Sources checked Oct 3, 2026

9.4CRITICALCVSS out of 10

What this means

Review the available evidence

CVE-2026-4739 and is rated Critical severity with a CVSS score of 9.4. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

CISA KEVNot listedBased on the latest collected catalog

EPSS0.4%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-4739?

Integer Overflow or Wraparound vulnerability in InsightSoftwareConsortium ITK (‎Modules/ThirdParty/Expat/src/expat modules).This issue affects ITK: before 2.7.1.