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CVE-2026-42478

An issue was discovered in VrmlData_IndexedFaceSet::TShape in the VRML V2.0 parser in Open...

7.5 High

An issue was discovered in VrmlData_IndexedFaceSet::TShape in the VRML V2.0 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 malformed VRML input can trigger dereference of a corrupt or unvalidated pointer during shape construction in libTKDEVRML.so.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.22%Up 0.2 points since May 2, 2026
90%50%10%1%

What each source reports

NVD Score used 7.5

An issue was discovered in VrmlData_IndexedFaceSet::TShape in the VRML V2.0 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 malformed VRML input can trigger dereference of a corrupt or unvalidated pointer during shape construction in libTKDEVRML.so.

Record
CVE-2026-42478
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476, CWE-125
Updated
2026-11-02
CVE List 5.5

An issue was discovered in VrmlData_IndexedFaceSet::TShape in the VRML V2.0 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 malformed VRML input can trigger dereference of a corrupt or unvalidated pointer during shape construction in libTKDEVRML.so.

Record
CVE-2026-42478
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-125
Updated
2026-11-02
EUVDEUVD-2026-26601 5.5

An issue was discovered in VrmlData_IndexedFaceSet::TShape in the VRML V2.0 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 malformed VRML input can trigger dereference of a corrupt or unvalidated pointer during shape construction in libTKDEVRML.so.

Record
EUVD-2026-26601
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-9mvh-w57g-g5m8 7.5

An issue was discovered in VrmlData_IndexedFaceSet::TShape in the VRML V2.0 parser in Open...

An issue was discovered in VrmlData_IndexedFaceSet::TShape in the VRML V2.0 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 malformed VRML input can trigger dereference of a corrupt or unvalidated pointer during shape construction in libTKDEVRML.so.

Record
GHSA-9mvh-w57g-g5m8
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-125, CWE-476
Updated
2026-11-02
OSV 5.5

An issue was discovered in VrmlData_IndexedFaceSet::TShape in the VRML V2.0 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 malformed VRML input can trigger dereference of a corrupt or unvalidated pointer during shape construction in libTKDEVRML.so.

Record
CVE-2026-42478
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2026-42478 7.5

An issue was discovered in VrmlData_IndexedFaceSet::TShape in the VRML V2.0 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 malformed VRML input can trigger dereference of a corrupt or unvalidated pointer during shape construction in libTKDEVRML.so.

Record
DEBIAN-CVE-2026-42478
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-42478 7.5

An issue was discovered in VrmlData_IndexedFaceSet::TShape in the VRML V2.0 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 malformed VRML input can trigger dereference of a corrupt or unvalidated pointer during shape construction in libTKDEVRML.so.

Record
UBUNTU-CVE-2026-42478
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
opencascade
Debian:12
 All versions, plus listed versions
7.6.3+dfsg1-77.6.3+dfsg1-7.17.7.1+dfsg1-1~exp17.7.1+dfsg1-1~exp27.8.1+dfsg1-1
Show 14 moreShow less
7.8.1+dfsg1-1~exp17.8.1+dfsg1-27.8.1+dfsg1-37.8.1+dfsg1-4~exp17.8.1+dfsg1-57.8.1+dfsg1-67.8.1+dfsg1-77.9.1+dfsg-1~exp17.9.1+dfsg-1~exp27.9.2+dfsg-17.9.2+dfsg-27.9.2+dfsg-37.9.2+dfsg-47.9.2+dfsg-5
 None known
opencascade
Debian:13
 All versions, plus listed versions
7.8.1+dfsg1-37.8.1+dfsg1-4~exp17.8.1+dfsg1-57.8.1+dfsg1-67.8.1+dfsg1-7
Show 7 moreShow less
7.9.1+dfsg-1~exp17.9.1+dfsg-1~exp27.9.2+dfsg-17.9.2+dfsg-27.9.2+dfsg-37.9.2+dfsg-47.9.2+dfsg-5
 None known
opencascade
Debian:14
 All versions, plus listed versions
7.8.1+dfsg1-37.8.1+dfsg1-4~exp17.8.1+dfsg1-57.8.1+dfsg1-67.8.1+dfsg1-7
Show 7 moreShow less
7.9.1+dfsg-1~exp17.9.1+dfsg-1~exp27.9.2+dfsg-17.9.2+dfsg-27.9.2+dfsg-37.9.2+dfsg-47.9.2+dfsg-5
 None known
opencascade
Ubuntu:20.04:LTS
 All versions, plus listed versions
7.3.3+dfsg1-17.3.3+dfsg1-1build1
 None known
opencascade
Ubuntu:22.04:LTS
 All versions, plus listed versions
7.5.1+dfsg1-27.5.1+dfsg1-2ubuntu1
 None known
opencascade
Ubuntu:24.04:LTS
 All versions, plus listed versions
7.6.3+dfsg1-77.6.3+dfsg1-7.17.6.3+dfsg1-7.1build1
 None known
opencascade
Ubuntu:25.10
 All versions, plus listed versions
7.8.1+dfsg1-3
 None known
opencascade
Ubuntu:26.10
 All versions, plus listed versions
7.9.2+dfsg-47.9.2+dfsg-4build1
 None known
opencascade
Ubuntu:26.04:LTS
 All versions, plus listed versions
7.8.1+dfsg1-37.9.2+dfsg-27.9.2+dfsg-37.9.2+dfsg-4
 None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-42478 is a high vulnerability (CVSS 7.5) in Opencascade Open Cascade Technology, published May 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.22%, the 12th percentile. No source names a fixed version.

References

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