Open CASCADE Technology OCCT 8.0.0.rc5 OBJ File Parser ReadLine out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Open CASCADE Technology OCCT 8.0.0.rc5. It has been rated as problematic. Affected by this vulnerability is the function Standard_ReadLineBuffer::ReadLine of the component OBJ File Parser. This manipulation causes out-of-bounds. This vulnerability is registered as CVE-2026-42477. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Open CASCADE Technology OCCT 8.0.0.rc5. It has been declared as problematic. Affected by this vulnerability is the function Standard_ReadLineBuffer::ReadLine of the component OBJ File Parser. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. The summary by CVE is:

A heap-based out-of-bounds read vulnerability in RWObj_Reader::read in the OBJ file parser in Open CASCADE Technology (OCCT) V8_0_0_rc5 allows user-assisted attackers to cause a denial of service or obtain sensitive information by persuading a victim to open a crafted OBJ file. The issue occurs because Standard_ReadLineBuffer::ReadLine() can return a 1-byte buffer for a minimal OBJ line, and RWObj_Reader::read() calls pushIndices(aLine + 2) without validating the buffer length.

The advisory is shared at gist.github.com. This vulnerability is known as CVE-2026-42477 since 04/27/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 311786 (Linux Distros Unpatched Vulnerability : CVE-2026-42477), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (311786). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 311786
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-42477

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/27/2026 CVE reserved
05/01/2026 +4 days Advisory disclosed
05/01/2026 +0 days VulDB entry created
05/03/2026 +2 days VulDB entry last update

Sourcesinfo

Advisory: gist.github.com
Status: Not defined

CVE: CVE-2026-42477 (🔒)
GCVE (CVE): GCVE-0-2026-42477
GCVE (VulDB): GCVE-100-360745

Entryinfo

Created: 05/01/2026 18:24
Updated: 05/03/2026 17:41
Changes: 05/01/2026 18:24 (54), 05/03/2026 17:41 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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