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CVE-2026-42480

A stack-based out-of-bounds read vulnerability in VrmlData_Scene::ReadLine in the VRML parser in...

5.5 Medium

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.10%Up 0.1 points since May 2, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.5

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.

Record
CVE-2026-42480
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-2026-26677 5.5

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.

Record
EUVD-2026-26677
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-c7gg-3q89-p762 5.5

A stack-based out-of-bounds read vulnerability in VrmlData_Scene::ReadLine in the VRML parser in...

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.

Record
GHSA-c7gg-3q89-p762
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
NVD 5.5

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.

Record
CVE-2026-42480
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
OSV 5.5

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.

Record
CVE-2026-42480
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-2026-42480 5.5

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.

Record
DEBIAN-CVE-2026-42480
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
OSVUBUNTU-CVE-2026-42480 5.5

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.

Record
UBUNTU-CVE-2026-42480
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-2026-42480 is a medium vulnerability (CVSS 5.5) 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 0.10%, the 0th percentile. No source names a fixed version.

References

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