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CVE-2026-4739

Integer overflow vulnerabilities in InsightSoftwareConsortium/ITK

9.4 Critical

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

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Passive

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.26%Up 0.2 points since Mar 24, 2026
90%50%10%1%

What each source reports

CVE List Score used 9.4

Integer overflow vulnerabilities in InsightSoftwareConsortium/ITK

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

Record
CVE-2026-4739
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/S:P/AU:Y/R:U/V:C/RE:M/U:Amber
Weakness
CWE-190
Updated
2026-11-02
EUVDEUVD-2026-14707 9.4

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

Record
EUVD-2026-14707
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/S:P/AU:Y/R:U/V:C/RE:M/U:Amber
Updated
2026-11-02
GitHub AdvisoriesGHSA-9vxh-wwmc-c2m7 9.4

Integer Overflow or Wraparound vulnerability in InsightSoftwareConsortium ITK (‎Modules...

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

Record
GHSA-9vxh-wwmc-c2m7
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:U/V:C/RE:M/U:Amber
Weakness
CWE-190
Updated
2026-11-02
NVD 9.4

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

Record
CVE-2026-4739
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:U/V:C/RE:M/U:Amber
Weakness
CWE-190
Updated
2026-11-02
OSVDEBIAN-CVE-2026-4739 9.4

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

Record
DEBIAN-CVE-2026-4739
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:U/V:C/RE:M/U:Amber
Updated
2026-11-02
OSVUBUNTU-CVE-2026-4739 9.4

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

Record
UBUNTU-CVE-2026-4739
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/S:P/AU:Y/R:U/V:C/RE:M/U:Amber
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
insighttoolkit4
Debian:12
 All versions, plus listed versions
4.13.3withdata-dfsg2-44.13.3withdata-dfsg2-4+deb12u1
 None known
insighttoolkit5
Debian:12
 All versions, plus listed versions
5.2.1-55.2.1-5+deb12u15.3.0-15.3.0-25.3.0-3
Show 18 moreShow less
5.3.0-45.3.0-55.3.0-65.3.0-75.3.0-9~0exp05.4.0-15.4.0-25.4.3-15.4.3-25.4.3-35.4.3-45.4.3-55.4.4-15.4.5-15.4.5-25.4.6-15.4.6-25.4.7-1
 None known
insighttoolkit5
Debian:13
 All versions, plus listed versions
5.4.3-55.4.4-15.4.5-15.4.5-25.4.6-15.4.6-25.4.7-1
 None known
insighttoolkit5
Debian:14
 All versions, plus listed versions
5.4.3-55.4.4-15.4.5-15.4.5-25.4.6-15.4.6-25.4.7-1
 None known
matanza
Ubuntu:20.04:LTS
 All versions, plus listed versions
0.13+ds1-60.13+ds2-1
 None known
matanza
Ubuntu:22.04:LTS
 All versions, plus listed versions
0.13+ds2-1
 None known
matanza
Ubuntu:24.04:LTS
 All versions, plus listed versions
0.13+ds2-10.13+ds2-1build10.13+ds2-1build2
 None known
cadaver
Ubuntu:25.10
 All versions, plus listed versions
0.26+dfsg-2
 None known
expat
Ubuntu:25.10
 All versions, plus listed versions
2.7.1-12.7.1-22.7.1-2ubuntu0.2
 None known
matanza
Ubuntu:25.10
 All versions, plus listed versions
0.13+ds2-2
 None known
Show 6 moreShow less
Affected packages
PackageAffectedFixed
swish-e
Ubuntu:25.10
 All versions, plus listed versions
2.4.7-6.32.4.7-6.3build12.4.7-7
 None known
tdom
Ubuntu:25.10
 All versions, plus listed versions
0.9.5.1-20.9.5.1-3
 None known
wbxml2
Ubuntu:25.10
 All versions, plus listed versions
0.11.10+dfsg-2
 None known
xmlrpc-c
Ubuntu:25.10
 All versions, plus listed versions
1.59.03-71.59.03-91.59.03-101.59.03-10.1
 None known
matanza
Ubuntu:26.10
 All versions, plus listed versions
0.13+ds2-2build1
 None known
matanza
Ubuntu:26.04:LTS
 All versions, plus listed versions
0.13+ds2-20.13+ds2-2build1
 None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-4739 is a critical vulnerability (CVSS 9.4) in Insightsoftwareconsortium Itk, published March 24, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 18th percentile. No source names a fixed version.

References

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