Application crash via unchecked VRML buffer offset
Published May 1, 2026 · Updated May 1, 2026
An out-of-bounds read in the VRML parser in OCCT 8.0.0-rc5 allows local users to crash applications with crafted VRML files. In VrmlData_Scene::ReadLine, the quoted-string escape handler increments anOffset and dereferences a fixed stack buffer without checking the resulting index. Local access is required, but no separate user interaction is needed; the demonstrated consequence is a repeatable application crash without reported data exposure or modification.
Summary
What happened
An out-of-bounds read in the VRML parser in OCCT 8.0.0-rc5 allows local users to crash applications with crafted VRML files. In VrmlData_Scene::ReadLine, the quoted-string escape handler increments anOffset and dereferences a fixed stack buffer without checking the resulting index. Local access is required, but no separate user interaction is needed; the demonstrated consequence is a repeatable application crash without reported data exposure or modification.
The record
- CVE
- CVE-2026-42480
- Published
- May 1, 2026
- Updated
- May 1, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-125, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 1, 2026CVE publishedPublication date reported by the CVE source.
- May 1, 2026Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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Your stack
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