CVE-2026-42477

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Source
https://cve.org/CVERecord?id=CVE-2026-42477
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42477.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-42477
Downstream
Published
2026-05-01T00:00:00Z
Modified
2026-07-08T08:13:19.503099410Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

A heap-based out-of-bounds read vulnerability in RWObjReader::read in the OBJ file parser in Open CASCADE Technology (OCCT) V800rc5 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 StandardReadLineBuffer::ReadLine() can return a 1-byte buffer for a minimal OBJ line, and RWObjReader::read() calls pushIndices(aLine + 2) without validating the buffer length.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42477.json",
    "cna_assigner": "mitre"
}
References

Affected packages

Git / github.com/open-cascade-sas/occt

Affected ranges

Type
GIT
Repo
https://github.com/open-cascade-sas/occt
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
a016080bf6738d6aeae020badee4e888ad1540a5
Introduced
344d6139b6d2a63849949442d1d12e684d3413b5
Last affected
0ebbbedb239d6fffb7e1c8c2d36970a3ab1d9300
Database specific 
{
    "source": [
        "CPE_RANGE",
        "CPE_STRING"
    ],
    "cpe": [
        "cpe:2.3:a:opencascade:open_cascade_technology:*:*:*:*:*:*:*:*",
        "cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:beta1:*:*:*:*:*:*",
        "cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc1:*:*:*:*:*:*",
        "cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc2:*:*:*:*:*:*",
        "cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc3:*:*:*:*:*:*",
        "cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc4:*:*:*:*:*:*",
        "cpe:2.3:a:opencascade:open_cascade_technology:8.0.0:rc5:*:*:*:*:*:*"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "7.9.3"
        },
        {
            "introduced": "8.0.0-beta1"
        },
        {
            "last_affected": "8.0.0-beta1"
        },
        {
            "introduced": "8.0.0-rc1"
        },
        {
            "last_affected": "8.0.0-rc1"
        },
        {
            "introduced": "8.0.0-rc2"
        },
        {
            "last_affected": "8.0.0-rc2"
        },
        {
            "introduced": "8.0.0-rc3"
        },
        {
            "last_affected": "8.0.0-rc3"
        },
        {
            "introduced": "8.0.0-rc4"
        },
        {
            "last_affected": "8.0.0-rc4"
        },
        {
            "introduced": "8.0.0-rc5"
        },
        {
            "last_affected": "8.0.0-rc5"
        }
    ]
}

Affected versions

8.*
8.0.0-beta1
8.0.0-rc1
8.0.0-rc2
8.0.0-rc3
8.0.0-rc4
8.0.0-rc5
Other
V6_5_0
V6_5_1
V6_5_2
V6_5_3
V6_5_3_beta1
V6_5_4
V6_5_4_beta1
V6_6_0
V6_6_0_beta
V6_7_0
V6_7_0_beta
V6_8_0
V6_8_0_beta
V6_9_0
V6_9_0_beta
V6_9_0_beta1
V6_9_0_beta2
V7_0_0
V7_0_0_beta
V7_0_0rc
V7_1_0
V7_1_0_beta
V7_2_0
V7_2_0_beta
V7_3_0
V7_3_0_beta
V7_4_0
V7_4_0_beta
V7_5_0
V7_5_0_beta
V7_6_0
V7_7_0
V7_7_0_beta
V7_8_0
V7_9_0
V7_9_0_beta1
V7_9_0_beta2
V7_9_1
V7_9_2
V7_9_3
V8_0_0_rc1
V8_0_0_rc2
V8_0_0_rc3
V8_0_0_rc4
V8_0_0_rc5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42477.json"