CVE-2026-42480

5.5 MEDIUM 0.1% exploit odds No fix listed Memory safety Library

What it is

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.

At a glance

Exploitability: Can be exploited locally on the machine with a low-privilege account. High risk of service disruption.
Exploit odds: 0.1% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2026-05-01 16:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 10:47 UTC Last updatedMost recent change to the record

Details

Published: 2026-05-01 16:16 UTC
Last modified: 2026-06-17 10:47 UTC
Exploit probability: 0.1% · EPSS, next 30 days
Weakness: CWE-125 · Out-of-bounds read
Record status: Analyzed

Affected

Opencascade Open Cascade Technology ≤ 7.9.3
Opencascade Open Cascade Technology 8.0.0

Attack profile CVSS 3.1 · 5.5

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Raw vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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References

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

NVD record · CVE.org record