CVE-2026-126497 (GCVE-0-2026-126497)

Vulnerability from cvelistv5 – Published: 2026-11-11 00:58 – Updated: 2026-11-11 00:58
VLAI
Title
LibreCAD through 2.2.1.6 Heap Out-of-Bounds Write via dwgReader18::parseDataPage
Summary
LibreCAD through 2.2.1.6 contains a heap-based out-of-bounds write vulnerability in the bundled libdxfrw dwgReader18::parseDataPage() function due to unchecked buffer size and page offsets. Attackers can craft an AC1018 (R2004) DWG file with malicious startOffset values that cause decompress18 to write past the heap buffer when opened, causing crashes and potential code execution.
Severity
8.5 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
LibreCAD LibreCAD Affected: 0 , ≤ 2.2.1.6 (custom)
    cpe:2.3:a:librecad:librecad:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-11-08 00:00
Credits
Lee Keon-Hyeong Park-Jung-Hyun dxli
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/LibreCAD/LibreCAD",
          "product": "LibreCAD",
          "repo": "https://github.com/LibreCAD/LibreCAD",
          "vendor": "LibreCAD",
          "versions": [
            {
              "lessThanOrEqual": "2.2.1.6",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:librecad:librecad:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "2.2.1.6",
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              "negate": false,
              "operator": "OR"
            }
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        }
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      "credits": [
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          "type": "finder",
          "value": "Lee Keon-Hyeong"
        },
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          "type": "finder",
          "value": "Park-Jung-Hyun"
        },
        {
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          "type": "remediation developer",
          "value": "dxli"
        }
      ],
      "datePublic": "2026-11-08T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "LibreCAD through 2.2.1.6 contains a heap-based out-of-bounds write vulnerability in the bundled libdxfrw dwgReader18::parseDataPage() function due to unchecked buffer size and page offsets. Attackers can craft an AC1018 (R2004) DWG file with malicious startOffset values that cause decompress18 to write past the heap buffer when opened, causing crashes and potential code execution."
        }
      ],
      "metrics": [
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            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
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            "vulnConfidentialityImpact": "HIGH",
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            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
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      "providerMetadata": {
        "dateUpdated": "2026-11-11T00:58:50.339Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/LibreCAD/LibreCAD/issues/3256"
        },
        {
          "tags": [
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          "url": "https://github.com/LibreCAD/LibreCAD/commit/17ba2b273b89cc9c8b6fcf71882e327ccf1eebf6"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/LibreCAD/LibreCAD/blob/v2.2.1.6/libraries/libdxfrw/src/intern/dwgreader18.cpp#L113-L173"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/LibreCAD/LibreCAD"
        },
        {
          "name": "VulnCheck Advisory: LibreCAD through 2.2.1.6 Heap Out-of-Bounds Write via dwgReader18::parseDataPage",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/librecad-through-2.2.1.6-heap-out-of-bounds-write-via-dwgreader18-parsedatapage"
        }
      ],
      "title": "LibreCAD through 2.2.1.6 Heap Out-of-Bounds Write via dwgReader18::parseDataPage",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-126497",
    "datePublished": "2026-11-11T00:58:50.339Z",
    "dateReserved": "2026-11-10T21:45:21.807Z",
    "dateUpdated": "2026-11-11T00:58:50.339Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}



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