| Name | CVE-2026-4739 |
| Description | Integer Overflow or Wraparound vulnerability in InsightSoftwareConsortium ITK (Modules/ThirdParty/Expat/src/expat modules).This issue affects ITK: before 2.7.1. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| insighttoolkit4 (PTS) | bullseye | 4.13.3withdata-dfsg1-4 | vulnerable |
| bookworm | 4.13.3withdata-dfsg2-4+deb12u1 | vulnerable |
| insighttoolkit5 (PTS) | bookworm | 5.2.1-5+deb12u1 | vulnerable |
| trixie | 5.4.3-5 | vulnerable |
| forky, sid | 5.4.5-2 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| insighttoolkit4 | source | (unstable) | (unfixed) | unimportant | | |
| insighttoolkit5 | source | (unstable) | (unfixed) | unimportant | | |
Notes
https://github.com/InsightSoftwareConsortium/ITK/pull/5351
CVE is specific for the issues fixed in the embedded copy of expat in ITK.
insighttoolkit* in Debian compiles with ITK_USE_SYSTEM_EXPAT:BOOL=ON
and uses the system library.