Vulnerability-Lookup

PYSEC-2026-2454

Vulnerability from pysec - Published: 2026-07-13 15:15 - Updated: 2026-07-13 16:03

Details

Docling's METS GBS backend is vulnerable to XML Entity Expansion (XXE) attacks thru 2.61.0. The backend extracts and validates XML files from .tar.gz archives using etree.fromstring() without disabling entity resolution. An attacker can craft a malicious XML file with nested entity definitions (XML Bomb) and package it into a .tar.gz archive. When processed by Docling, the exponential expansion of entities during XML parsing leads to excessive resource consumption, resulting in a denial of service (DoS) condition on the system running the Docling parser.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impacted products

Name	purl
docling	pkg:pypi/docling

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "docling",
        "purl": "pkg:pypi/docling"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "2.61.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.1.0",
        "0.1.1",
        "0.1.2",
        "0.2.0",
        "0.3.0",
        "0.3.1",
        "0.4.0",
        "1.0.0",
        "1.0.1",
        "1.0.2",
        "1.1.0",
        "1.1.1",
        "1.1.2",
        "1.10.0",
        "1.11.0",
        "1.12.0",
        "1.12.1",
        "1.12.2",
        "1.13.0",
        "1.13.1",
        "1.14.0",
        "1.15.0",
        "1.16.0",
        "1.16.1",
        "1.17.0",
        "1.18.0",
        "1.19.0",
        "1.19.1",
        "1.2.0",
        "1.2.1",
        "1.20.0",
        "1.3.0",
        "1.4.0",
        "1.5.0",
        "1.6.0",
        "1.6.1",
        "1.6.2",
        "1.6.3",
        "1.7.0",
        "1.7.1",
        "1.8.0",
        "1.8.1",
        "1.8.2",
        "1.8.3",
        "1.8.4",
        "1.8.5",
        "1.9.0",
        "2.0.0",
        "2.1.0",
        "2.10.0",
        "2.11.0",
        "2.12.0",
        "2.13.0",
        "2.14.0",
        "2.15.0",
        "2.15.1",
        "2.16.0",
        "2.17.0",
        "2.18.0",
        "2.19.0",
        "2.2.0",
        "2.2.1",
        "2.20.0",
        "2.21.0",
        "2.22.0",
        "2.23.0",
        "2.23.1",
        "2.24.0",
        "2.25.0",
        "2.25.1",
        "2.25.2",
        "2.26.0",
        "2.27.0",
        "2.28.0",
        "2.28.1",
        "2.28.2",
        "2.28.3",
        "2.28.4",
        "2.29.0",
        "2.3.0",
        "2.3.1",
        "2.30.0",
        "2.31.0",
        "2.31.1",
        "2.31.2",
        "2.32.0",
        "2.33.0",
        "2.34.0",
        "2.35.0",
        "2.36.0",
        "2.36.1",
        "2.37.0",
        "2.38.0",
        "2.38.1",
        "2.39.0",
        "2.4.0",
        "2.4.1",
        "2.4.2",
        "2.40.0",
        "2.41.0",
        "2.42.0",
        "2.42.1",
        "2.42.2",
        "2.43.0",
        "2.44.0",
        "2.45.0",
        "2.46.0",
        "2.47.0",
        "2.47.1",
        "2.48.0",
        "2.49.0",
        "2.5.0",
        "2.5.1",
        "2.5.2",
        "2.50.0",
        "2.51.0",
        "2.52.0",
        "2.53.0",
        "2.54.0",
        "2.55.0",
        "2.55.1",
        "2.56.0",
        "2.56.1",
        "2.57.0",
        "2.58.0",
        "2.59.0",
        "2.6.0",
        "2.60.0",
        "2.60.1",
        "2.61.0",
        "2.7.0",
        "2.7.1",
        "2.8.0",
        "2.8.1",
        "2.8.2",
        "2.8.3",
        "2.9.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-31248",
    "GHSA-9f4q-q82q-4359"
  ],
  "details": "Docling\u0027s METS GBS backend is vulnerable to XML Entity Expansion (XXE) attacks thru 2.61.0. The backend extracts and validates XML files from .tar.gz archives using etree.fromstring() without disabling entity resolution. An attacker can craft a malicious XML file with nested entity definitions (XML Bomb) and package it into a .tar.gz archive. When processed by Docling, the exponential expansion of entities during XML parsing leads to excessive resource consumption, resulting in a denial of service (DoS) condition on the system running the Docling parser.",
  "id": "PYSEC-2026-2454",
  "modified": "2026-07-13T16:03:56.038082Z",
  "published": "2026-07-13T15:15:45.363503Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31248"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/docling-project/docling"
    },
    {
      "type": "WEB",
      "url": "https://www.notion.so/CVE-2026-31248-35d1e1393188818585b2ce3b9ce24686"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/docling"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-9f4q-q82q-4359"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Docling\u0027s METS GBS backend is vulnerable to XML Entity Expansion (XXE) attacks"
}

CVE-2026-31248 (GCVE-0-2026-31248)

Vulnerability from cvelistv5 – Published: 2026-05-11 00:00 – Updated: 2026-05-12 18:44

Summary

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-12 18:43 UTC

CWE

n/a
CWE-776 - Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

Assigner

mitre mitre root

References

2 references

URL	Tags
https://github.com/docling-project/docling
https://www.notion.so/CVE-2026-31248-35d1e1393188…

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-31248",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-12T18:43:49.052708Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-776",
                "description": "CWE-776 Improper Restriction of Recursive Entity References in DTDs (\u0027XML Entity Expansion\u0027)",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-12T18:44:28.080Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Docling\u0027s METS GBS backend is vulnerable to XML Entity Expansion (XXE) attacks thru 2.61.0. The backend extracts and validates XML files from .tar.gz archives using etree.fromstring() without disabling entity resolution. An attacker can craft a malicious XML file with nested entity definitions (XML Bomb) and package it into a .tar.gz archive. When processed by Docling, the exponential expansion of entities during XML parsing leads to excessive resource consumption, resulting in a denial of service (DoS) condition on the system running the Docling parser."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T15:28:00.782Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://github.com/docling-project/docling"
        },
        {
          "url": "https://www.notion.so/CVE-2026-31248-35d1e1393188818585b2ce3b9ce24686"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2026-31248",
    "datePublished": "2026-05-11T00:00:00.000Z",
    "dateReserved": "2026-03-09T00:00:00.000Z",
    "dateUpdated": "2026-05-12T18:44:28.080Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

GHSA-9F4Q-Q82Q-4359

Vulnerability from github – Published: 2026-05-11 18:31 – Updated: 2026-05-18 15:21

Summary

Docling's METS GBS backend is vulnerable to XML Entity Expansion (XXE) attacks

Details

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "docling"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "2.61.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-31248"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-776"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-18T15:21:03Z",
    "nvd_published_at": "2026-05-11T17:16:19Z",
    "severity": "HIGH"
  },
  "details": "Docling\u0027s METS GBS backend is vulnerable to XML Entity Expansion (XXE) attacks thru 2.61.0. The backend extracts and validates XML files from .tar.gz archives using etree.fromstring() without disabling entity resolution. An attacker can craft a malicious XML file with nested entity definitions (XML Bomb) and package it into a .tar.gz archive. When processed by Docling, the exponential expansion of entities during XML parsing leads to excessive resource consumption, resulting in a denial of service (DoS) condition on the system running the Docling parser.",
  "id": "GHSA-9f4q-q82q-4359",
  "modified": "2026-05-18T15:21:03Z",
  "published": "2026-05-11T18:31:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31248"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/docling-project/docling"
    },
    {
      "type": "WEB",
      "url": "https://www.notion.so/CVE-2026-31248-35d1e1393188818585b2ce3b9ce24686"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Docling\u0027s METS GBS backend is vulnerable to XML Entity Expansion (XXE) attacks"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

PYSEC-2026-2454

CVE-2026-31248 (GCVE-0-2026-31248)

GHSA-9F4Q-Q82Q-4359

Tags

Sightings

Nomenclature