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Vulnerabilities

Vulnerability · 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.

Published Mar 24, 2026 · catalog updated Jun 17, 2026 · Integer Overflow or Wraparound

Check if you run it

No confirmed exploitation is on record for CVE-2026-4739. EPSS is 0.43%. Act only if a listed version of Integer Overflow or Wraparound is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Integer Overflow or Wraparound).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.43%
Remediation
Not established
Affected products
See sources for product scope

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

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-4739

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-4739. EPSS is 0.43%. Act only if a listed version of Integer Overflow or Wraparound is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-190: Integer Overflow. EPSS 0.43%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 24, 2026 · NIST NVD

    Detected

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

  2. Jun 17, 2026 · NIST NVD

    Updated

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

Sources

  • CVE.orgVulnerability recordCVE-2026-4739

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-4739

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-4739

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

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.