Vulnerability-Lookup

CVE-2026-44018 (GCVE-0-2026-44018)

Vulnerability from cvelistv5 – Published: 2026-06-26 15:40 – Updated: 2026-06-26 19:13

Title

Docling: Unsafe Archive Extraction and XML Parsing in METS-GBS Backend

Summary

Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.45.0 until 2.91.0, the METS-GBS backend's XML parsing and the input document format detection lacked security controls. An attacker could craft malicious METS-GBS archives that, when processed, could read sensitive files, exhaust system resources, or cause application crashes. This vulnerability is fixed in 2.91.0.

Severity

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
CWE-611 - Improper Restriction of XML External Entity Reference
CWE-776 - Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

Assigner

GitHub_M

References

2 references

URL	Tags
https://github.com/docling-project/docling/securi…	x_refsource_CONFIRM
https://github.com/docling-project/docling/releas…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
docling-project	docling	Affected: >= 2.45.0, < 2.91.0

Show details on NVD website

JSON

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GHSA-R3XG-RG9J-67FV

Vulnerability from github – Published: 2026-06-03 21:13 – Updated: 2026-06-03 21:13

Summary

Docling: Unsafe Archive Extraction and XML Parsing in METS-GBS Backend

Details

Impact

The METS-GBS backend's XML parsing and the input document format detection lacked security controls, enabling: - XML External Entity (XXE) attacks to read local files or cause denial of service - Decompression bombs (zip bombs) to exhaust memory and disk space - Unbounded archive extraction consuming system resources

An attacker could craft malicious METS-GBS archives that, when processed, could read sensitive files, exhaust system resources, or cause application crashes.

Patches

Fixed in version 2.91.0. The fix implements: - Secure XML parsing with resolve_entities=False, load_dtd=False, and no_network=True - Configurable limits: 300 MB total extraction size, 10 MB per file, 1000 member count - Cumulative size tracking across all extractions - Early termination when limits are exceeded - Secure format detection of METS-GBS tar archives with _detect_mets_gbs() method: maximum file size (10 MB per file), maximum member count (1000 members), and exception handling to gracefully fail when limits are exceeded

Workarounds

Avoid processing METS-GBS archives from untrusted sources. If necessary, pre-validate archives in an isolated environment with resource limits.

References

Fix release: v2.91.0

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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": "2.45.0"
            },
            {
              "fixed": "2.91.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44018"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-409",
      "CWE-611",
      "CWE-776"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-03T21:13:32Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\nThe METS-GBS backend\u0027s XML parsing and the input document format detection lacked security controls, enabling:\n- XML External Entity (XXE) attacks to read local files or cause denial of service\n- Decompression bombs (zip bombs) to exhaust memory and disk space\n- Unbounded archive extraction consuming system resources\n\nAn attacker could craft malicious METS-GBS archives that, when processed, could read sensitive files, exhaust system resources, or cause application crashes.\n\n### Patches\nFixed in version 2.91.0. The fix implements:\n- Secure XML parsing with `resolve_entities=False`, `load_dtd=False`, and `no_network=True`\n- Configurable limits: 300 MB total extraction size, 10 MB per file, 1000 member count\n- Cumulative size tracking across all extractions\n- Early termination when limits are exceeded\n- Secure format detection of METS-GBS tar archives with `_detect_mets_gbs()` method: maximum file size (10 MB per file), maximum member count (1000 members), and exception handling to gracefully fail when limits are exceeded\n\n### Workarounds\nAvoid processing METS-GBS archives from untrusted sources. If necessary, pre-validate archives in an isolated environment with resource limits.\n\n### References\n- Fix release: [v2.91.0](https://github.com/docling-project/docling/releases/tag/v2.91.0)",
  "id": "GHSA-r3xg-rg9j-67fv",
  "modified": "2026-06-03T21:13:33Z",
  "published": "2026-06-03T21:13:32Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/docling-project/docling/security/advisories/GHSA-r3xg-rg9j-67fv"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/docling-project/docling"
    },
    {
      "type": "WEB",
      "url": "https://github.com/docling-project/docling/releases/tag/v2.91.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Docling: Unsafe Archive Extraction and XML Parsing in METS-GBS Backend"
}

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.

Action not permitted

CVE-2026-44018 (GCVE-0-2026-44018)

GHSA-R3XG-RG9J-67FV

Impact

Patches

Workarounds

References

Tags

Sightings

Nomenclature