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Vulnerability · Published May 1, 2026 · Assigned by mitre

CVE-2026-42480

Medium 5.5

In plain English

A medium-severity out-of-bounds read in the opencascade package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)<0.1%top 99.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A stack-based out-of-bounds read vulnerability in VrmlData_Scene::ReadLine 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 the quoted-string escape handler uses ptr[++anOffset] without proper bounds checking, which can read past the end of a fixed-size stack buffer.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12opencascadeno fix listedDEBIAN-CVE-2026-42480
Debian:13opencascadeno fix listedDEBIAN-CVE-2026-42480
Debian:14opencascadeno fix listedDEBIAN-CVE-2026-42480
Ubuntu:22.04:LTSopencascadeno fix listedUBUNTU-CVE-2026-42480
Ubuntu:24.04:LTSopencascadeno fix listedUBUNTU-CVE-2026-42480
Ubuntu:25.10opencascadeno fix listedUBUNTU-CVE-2026-42480
Ubuntu:26.04:LTSopencascadeno fix listedUBUNTU-CVE-2026-42480
Ubuntu:26.10opencascadeno fix listedUBUNTU-CVE-2026-42480

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References