CVE-2026-42479

Name	CVE-2026-42479
Description	An out-of-bounds read vulnerability in VrmlData_IndexedLineSet::TShape in the VRML parser in Open CASCADE Technology (OCCT) V8_0_0_rc5 allows attackers to cause a denial of service via a crafted VRML file. The issue occurs because coordIndex values from parsed input are used as direct array indices without validation against the size of the coordinate array during geometry processing.
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
opencascade (PTS)	bullseye	7.5.1+dfsg1-2	vulnerable
	bookworm	7.6.3+dfsg1-7	vulnerable
	trixie	7.8.1+dfsg1-3	vulnerable
	forky, sid	7.9.2+dfsg-4	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
opencascade	source	(unstable)	(unfixed)

https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a