Docling: Unbounded table rowspan/colspan in HTML, JATS, ODS and BoxNote backends causes CPU/memory exhaustion

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-105749",
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "dateUpdated": "2026-10-05T21:36:53.431Z",
    "dateReserved": "2026-10-05T19:11:07.947Z",
    "datePublished": "2026-10-05T21:36:53.431Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M",
        "dateUpdated": "2026-10-05T21:36:53.431Z"
      },
      "title": "Docling: Unbounded table rowspan/colspan in HTML, JATS, ODS and BoxNote backends causes CPU/memory exhaustion",
      "descriptions": [
        {
          "lang": "en",
          "value": "Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.0.0 until 2.131.0, the HTML, JATS, OpenDocument spreadsheet, and BoxNote backends, including docling/backend/html_backend.py, docling/backend/jats_backend.py, and docling/backend/boxnote_backend.py, accept the rowspan and colspan attribute values without an upper bound and execute loops or allocate a table grid proportional to the declared span. A very small document can therefore cause sustained CPU use or multi-gigabyte memory allocation, and the document_timeout setting does not interrupt the single backend conversion call. Export through the TableData.grid property can further materialize the oversized grid. This issue is fixed in 2.131.0."
        }
      ],
      "affected": [
        {
          "vendor": "docling-project",
          "product": "docling",
          "versions": [
            {
              "version": ">= 2.0.0, < 2.131.0",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "docling-project",
          "product": "docling-slim",
          "versions": [
            {
              "version": ">= 2.92.0, < 2.131.0",
              "status": "affected"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "cweId": "CWE-400",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-789: Memory Allocation with Excessive Size Value",
              "cweId": "CWE-789",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/docling-project/docling/security/advisories/GHSA-cgc7-9qp3-86m3",
          "name": "https://github.com/docling-project/docling/security/advisories/GHSA-cgc7-9qp3-86m3",
          "tags": [
            "x_refsource_CONFIRM"
          ]
        },
        {
          "url": "https://github.com/docling-project/docling/pull/4414",
          "name": "https://github.com/docling-project/docling/pull/4414",
          "tags": [
            "x_refsource_MISC"
          ]
        },
        {
          "url": "https://github.com/docling-project/docling/commit/c5b4429cc6500a344c13edeb22e67610c2159b09",
          "name": "https://github.com/docling-project/docling/commit/c5b4429cc6500a344c13edeb22e67610c2159b09",
          "tags": [
            "x_refsource_MISC"
          ]
        },
        {
          "url": "https://github.com/docling-project/docling/releases/tag/v2.131.0",
          "name": "https://github.com/docling-project/docling/releases/tag/v2.131.0",
          "tags": [
            "x_refsource_MISC"
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "NONE",
            "userInteraction": "REQUIRED",
            "scope": "UNCHANGED",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM"
          }
        }
      ]
    }
  }
}