Vulnerability-Lookup

CVE-2026-44520 (GCVE-0-2026-44520)

Vulnerability from cvelistv5 – Published: 2026-05-14 16:56 – Updated: 2026-05-14 18:08

Title

Docling-Graph: SSRF via Missing Internal IP Validation in URLInputHandler

Summary

Docling-Graph turns documents into validated Pydantic objects, then builds a directed knowledge graph with explicit semantic relationships. Prior to 1.5.1, the URLInputHandler class in docling_graph/core/input/handlers.py makes HTTP requests to user-supplied URLs without validating whether the target resolves to a private, loopback, or link-local IP address. The URLValidator only checks for a valid scheme and non-empty netloc, performing no IP-level validation. Additionally, requests.head() was called with allow_redirects=True, allowing an attacker to redirect requests to internal endpoints via an intermediary URL. An attacker who can control the --source CLI argument or PipelineConfig.source API parameter can trigger Server-Side Request Forgery (SSRF). This vulnerability is fixed in 1.5.1.

Severity

5.7 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-14 18:04 UTC

CWE

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/docling-project/docling-graph/…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
docling-project	docling-graph	Affected: < 1.5.1

Show details on NVD website

JSON

To clipboard

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EUVD-2026-318575

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:38

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

JSON

To clipboard

{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:38:55.130426+00:00",
  "id": "EUVD-2026-318575"
}

FKIE_CVE-2026-44520

Vulnerability from fkie_nvd - Published: 2026-05-14 18:16 - Updated: 2026-06-17 10:50

Severity

5.7 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/docling-project/docling-graph/security/advisories/GHSA-fqph-j6v6-jvgx

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "docling-graph",
          "vendor": "docling-project",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.5.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Docling-Graph turns documents into validated Pydantic objects, then builds a directed knowledge graph with explicit semantic relationships. Prior to 1.5.1, the URLInputHandler class in docling_graph/core/input/handlers.py makes HTTP requests to user-supplied URLs without validating whether the target resolves to a private, loopback, or link-local IP address. The URLValidator only checks for a valid scheme and non-empty netloc, performing no IP-level validation. Additionally, requests.head() was called with allow_redirects=True, allowing an attacker to redirect requests to internal endpoints via an intermediary URL. An attacker who can control the --source CLI argument or PipelineConfig.source API parameter can trigger Server-Side Request Forgery (SSRF). This vulnerability is fixed in 1.5.1."
    }
  ],
  "id": "CVE-2026-44520",
  "lastModified": "2026-06-17T10:50:45.190",
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          "confidentialityImpact": "HIGH",
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GHSA-FQPH-J6V6-JVGX

Vulnerability from github – Published: 2026-05-07 03:15 – Updated: 2026-05-14 20:54

Summary

docling-graph has SSRF via Missing Internal IP Validation in URLInputHandler

Details

Impact

The URLInputHandler class in docling_graph/core/input/handlers.py makes HTTP requests to user-supplied URLs without validating whether the target resolves to a private, loopback, or link-local IP address. The URLValidator only checks for a valid scheme and non-empty netloc, performing no IP-level validation. Additionally, requests.head() was called with allow_redirects=True, allowing an attacker to redirect requests to internal endpoints via an intermediary URL.

An attacker who can control the --source CLI argument or PipelineConfig.source API parameter can trigger Server-Side Request Forgery (SSRF) to reach: - Cloud metadata endpoints (e.g. 169.254.169.254) to steal IAM credentials - Internal services on loopback (127.0.0.1) or private network ranges (10.x, 172.16.x, 192.168.x)

This affects deployments where docling-graph processes URLs from untrusted input, such as multi-tenant pipelines or server-side automation.

Patches

The vulnerability is fixed in v1.5.1.

Users should upgrade immediately:

pip install --upgrade docling-graph

The fix adds IP validation via ipaddress and socket.gethostbyname() before any request is made, blocks private/loopback/link-local/reserved addresses, and disables redirect following (allow_redirects=False) with explicit validation of any Location header before following it.

Workarounds

If upgrading is not immediately possible, ensure that all URLs passed to URLInputHandler come exclusively from trusted, internal sources, never from user-supplied or external input. There is no safe code-level workaround short of applying the patch, as the vulnerability is in the library itself.

Resources

Severity

5.7 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.5.0"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "docling-graph"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44520"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601",
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-07T03:15:46Z",
    "nvd_published_at": "2026-05-14T18:16:50Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nThe `URLInputHandler` class in `docling_graph/core/input/handlers.py` makes HTTP requests to user-supplied URLs without validating whether the target resolves to a private, loopback, or link-local IP address. The `URLValidator` only checks for a valid scheme and non-empty `netloc`, performing no IP-level validation. Additionally, `requests.head()` was called with `allow_redirects=True`, allowing an attacker to redirect requests to internal endpoints via an intermediary URL.\n\nAn attacker who can control the `--source` CLI argument or `PipelineConfig.source` API parameter can trigger Server-Side Request Forgery (SSRF) to reach:\n- Cloud metadata endpoints (e.g. `169.254.169.254`) to steal IAM credentials\n- Internal services on loopback (`127.0.0.1`) or private network ranges (`10.x`, `172.16.x`, `192.168.x`)\n\nThis affects deployments where `docling-graph` processes URLs from untrusted input, such as multi-tenant pipelines or server-side automation.\n\n### Patches\n\nThe vulnerability is fixed in **v1.5.1**.\n\nUsers should upgrade immediately:\n```\npip install --upgrade docling-graph\n```\n\nThe fix adds IP validation via `ipaddress` and `socket.gethostbyname()` before any request is made, blocks private/loopback/link-local/reserved addresses, and disables redirect following (`allow_redirects=False`) with explicit validation of any `Location` header before following it.\n\n### Workarounds\n\nIf upgrading is not immediately possible, ensure that **all URLs passed to `URLInputHandler` come exclusively from trusted, internal sources**, never from user-supplied or external input. There is no safe code-level workaround short of applying the patch, as the vulnerability is in the library itself.\n\n### Resources\n\n- [CWE-918: Server-Side Request Forgery](https://cwe.mitre.org/data/definitions/918.html)\n- [OWASP SSRF Prevention Cheat Sheet](https://cheatsheetseries.owasp.org/cheatsheets/Server_Side_Request_Forgery_Prevention_Cheat_Sheet.html)\n- [AWS Instance Metadata endpoint](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html)",
  "id": "GHSA-fqph-j6v6-jvgx",
  "modified": "2026-05-14T20:54:24Z",
  "published": "2026-05-07T03:15:46Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/docling-project/docling-graph/security/advisories/GHSA-fqph-j6v6-jvgx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44520"
    },
    {
      "type": "WEB",
      "url": "https://cheatsheetseries.owasp.org/cheatsheets/Server_Side_Request_Forgery_Prevention_Cheat_Sheet.html"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/docling-project/docling-graph"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "docling-graph has SSRF via Missing Internal IP Validation in URLInputHandler"
}

PYSEC-2026-2458

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

Details

Impact

This affects deployments where docling-graph processes URLs from untrusted input, such as multi-tenant pipelines or server-side automation.

Patches

The vulnerability is fixed in v1.5.1.

Users should upgrade immediately:

pip install --upgrade docling-graph

Workarounds

Resources

Severity

5.7 (Medium)


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

Impacted products

Name	purl
docling-graph	pkg:pypi/docling-graph

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "docling-graph",
        "purl": "pkg:pypi/docling-graph"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.5.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.2.4",
        "0.2.5",
        "0.3.0",
        "0.4.0",
        "0.4.1",
        "1.0.0",
        "1.1.0",
        "1.2.0",
        "1.2.1",
        "1.2.2",
        "1.2.3",
        "1.2.4",
        "1.3.0",
        "1.3.1",
        "1.4.0",
        "1.4.3",
        "1.4.4",
        "1.5.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44520",
    "GHSA-fqph-j6v6-jvgx"
  ],
  "details": "### Impact\n\nThe `URLInputHandler` class in `docling_graph/core/input/handlers.py` makes HTTP requests to user-supplied URLs without validating whether the target resolves to a private, loopback, or link-local IP address. The `URLValidator` only checks for a valid scheme and non-empty `netloc`, performing no IP-level validation. Additionally, `requests.head()` was called with `allow_redirects=True`, allowing an attacker to redirect requests to internal endpoints via an intermediary URL.\n\nAn attacker who can control the `--source` CLI argument or `PipelineConfig.source` API parameter can trigger Server-Side Request Forgery (SSRF) to reach:\n- Cloud metadata endpoints (e.g. `169.254.169.254`) to steal IAM credentials\n- Internal services on loopback (`127.0.0.1`) or private network ranges (`10.x`, `172.16.x`, `192.168.x`)\n\nThis affects deployments where `docling-graph` processes URLs from untrusted input, such as multi-tenant pipelines or server-side automation.\n\n### Patches\n\nThe vulnerability is fixed in **v1.5.1**.\n\nUsers should upgrade immediately:\n```\npip install --upgrade docling-graph\n```\n\nThe fix adds IP validation via `ipaddress` and `socket.gethostbyname()` before any request is made, blocks private/loopback/link-local/reserved addresses, and disables redirect following (`allow_redirects=False`) with explicit validation of any `Location` header before following it.\n\n### Workarounds\n\nIf upgrading is not immediately possible, ensure that **all URLs passed to `URLInputHandler` come exclusively from trusted, internal sources**, never from user-supplied or external input. There is no safe code-level workaround short of applying the patch, as the vulnerability is in the library itself.\n\n### Resources\n\n- [CWE-918: Server-Side Request Forgery](https://cwe.mitre.org/data/definitions/918.html)\n- [OWASP SSRF Prevention Cheat Sheet](https://cheatsheetseries.owasp.org/cheatsheets/Server_Side_Request_Forgery_Prevention_Cheat_Sheet.html)\n- [AWS Instance Metadata endpoint](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html)",
  "id": "PYSEC-2026-2458",
  "modified": "2026-07-13T16:03:55.974437Z",
  "published": "2026-07-13T15:15:40.718557Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/docling-project/docling-graph/security/advisories/GHSA-fqph-j6v6-jvgx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44520"
    },
    {
      "type": "WEB",
      "url": "https://cheatsheetseries.owasp.org/cheatsheets/Server_Side_Request_Forgery_Prevention_Cheat_Sheet.html"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/docling-project/docling-graph"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/docling-graph"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-fqph-j6v6-jvgx"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "docling-graph has SSRF via Missing Internal IP Validation in URLInputHandler"
}

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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-44520 (GCVE-0-2026-44520)

EUVD-2026-318575

FKIE_CVE-2026-44520

GHSA-FQPH-J6V6-JVGX

Impact

Patches

Workarounds

Resources

PYSEC-2026-2458

Impact

Patches

Workarounds

Resources

Tags

Sightings

Nomenclature

Related by attack behaviour