Vulnerability-Lookup

CVE-2026-54691 (GCVE-0-2026-54691)

Vulnerability from cvelistv5 – Published: 2026-07-28 21:29 – Updated: 2026-07-29 14:18

Title

datamodel-code-generator vulnerable to SSRF via --url: no host/IP validation, follows redirects

Summary

datamodel-code-generator generates Python data models from schema definitions. From 0.9.1 until 0.61.0, src/datamodel_code_generator/http.py http.get_body accepts --url targets and redirect chain targets without host/IP validation, allowing server-side request forgery against loopback, private, link-local, metadata, and other network-accessible resources. This issue is fixed in version 0.61.0.

Severity

8.2 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-29 14:18 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7886 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/koxudaxi/datamodel-code-genera…	x_refsource_CONFIRM
https://github.com/koxudaxi/datamodel-code-genera…	x_refsource_MISC
https://github.com/koxudaxi/datamodel-code-genera…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
koxudaxi	datamodel-code-generator	Affected: >= 0.9.1, < 0.61.0	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-54691

Vulnerability from fkie_nvd - Published: 2026-07-28 22:17 - Updated: 2026-10-23 23:10

Severity

8.2 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/koxudaxi/datamodel-code-generator/commit/5fdba4a09f2d7a9996a504975b7ef7d63e3715bb
	security-advisories@github.com	https://github.com/koxudaxi/datamodel-code-generator/releases/tag/0.61.0
	security-advisories@github.com	https://github.com/koxudaxi/datamodel-code-generator/security/advisories/GHSA-rfr2-mq9m-x2qx
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/koxudaxi/datamodel-code-generator/security/advisories/GHSA-rfr2-mq9m-x2qx

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "datamodel-code-generator",
          "vendor": "koxudaxi",
          "versions": [
            {
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    },
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      "value": "datamodel-code-generator genera modelos de datos Python a partir de definiciones de esquema. Desde la versi\u00f3n 0.9.1 hasta la 0.61.0, src/datamodel_code_generator/http.py http.get_body acepta objetivos --url y objetivos de cadena de redirecci\u00f3n sin validaci\u00f3n de host/IP, lo que permite la falsificaci\u00f3n de petici\u00f3n del lado del servidor contra recursos de loopback, privados, de enlace local, de metadatos y otros recursos accesibles por red. Este problema est\u00e1 solucionado en la versi\u00f3n 0.61.0."
    }
  ],
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  "lastModified": "2026-10-23T23:10:00.157",
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}

GHSA-RFR2-MQ9M-X2QX

Vulnerability from github – Published: 2026-07-28 21:30 – Updated: 2026-07-28 21:30

Summary

datamodel-code-generator vulnerable to SSRF via --url: no host/IP validation, follows redirects

Details

Summary

datamodel-code-generator's built-in HTTP fetcher (http.get_body) issues an httpx.GET against any URL passed to --url (or reached via a redirect chain) with no allow-list, no deny-list, no IP/host validation, and follow_redirects=True. Loopback addresses, RFC1918 ranges, link-local (169.254.169.254 cloud metadata), unique-local IPv6 and any other network-accessible target are all reachable. The JSON/YAML response body is parsed as a schema and reflected into the generated .py source, exfiltrating the response to anyone with access to that file (commonly committed to a repository).

Details

Sink: src/datamodel_code_generator/http.py, get_body (lines 31–61, at tag 0.60.1 / commit a321547e):

def get_body(url, headers=None, ignore_tls=False,
             query_parameters=None, timeout=DEFAULT_HTTP_TIMEOUT) -> str:
    httpx = _get_httpx()
    try:
        response = httpx.get(
            url,
            headers=headers,
            verify=not ignore_tls,
            follow_redirects=True,          # (A)
            params=query_parameters,
            timeout=timeout,
        )
    except Exception as e:
        ...
    if response.status_code >= 400:
        ...
    content_type = response.headers.get("content-type", "").lower()
    if "text/html" in content_type:
        raise SchemaFetchError(...)         # (B) — only filter
    return response.text                    # (C) → embedded in generated.py

(A) follows redirects unconditionally — a public URL → 302 → internal address chain works.
(B) the only filter is rejecting text/html. Non-HTML internal endpoints (JSON APIs, cloud metadata, admin services) pass through.
(C) the response body becomes the schema; its title, description, properties, etc. land in the generated .py as class attributes and Field(description=...) strings.

get_body is called by parser/base.py:1326 (_get_text_from_url), which is reached from CLI argument --url <URL>. (The $ref path is a separate advisory — see GHSA-D.)

Only affects users who installed the [http] extra (pip install 'datamodel-code-generator[http]').

PoC

A self-contained one-file PoC available here: https://gist.github.com/thegr1ffyn/18de777d6c800a3b47715425e3f3e8f5

Impact

Who is impacted. Anyone who runs datamodel-codegen with a --url they didn't fully verify, or who runs it inside a network with reachable internal services. Realistic scenarios:

Trojan documentation / README. A blog post or README example reads datamodel-codegen --url https://schemas.example.com/user.json -o user.py. The attacker controls example.com, redirects to http://169.254.169.254/latest/meta-data/iam/security-credentials/<role>, and the IAM credentials end up as a docstring in user.py.
Internal port scan / disclosure. Iterating --url http://127.0.0.1:<port>/health probes localhost services; non-HTML, non-error responses confirm a service and leak its body into the generated file.
CI poisoning. A PR adds a Makefile rule that calls datamodel-codegen --url $(SCHEMA_URL); the CI runner reaches every internal service in its VPC and the response lands in PR artifacts.

Suggested fix. Resolve the URL host, reject loopback / private / link-local / multicast / reserved IPs by default, disable redirects by default (follow_redirects=False), re-validate after each redirect if the user opts into following them, and add an --allow-private-network flag for opt-in legitimate use.

Maintainer resolution

This report was fixed together with GHSA-954p-556p-r752 by the private security PR koxudaxi/datamodel-code-generator-ghsa-rfr2-mq9m-x2qx#1, merged into the public repository as 5fdba4a09f2d7a9996a504975b7ef7d63e3715bb. Follow-up generated-file and coverage fixes were merged in koxudaxi/datamodel-code-generator#3279 and docs were synced in #3280. The patched release is 0.61.0.

The patch hardens the shared HTTP fetcher used by both direct CLI --url fetching and remote JSON Schema/OpenAPI $ref resolution:

validates HTTP(S) URLs before fetching;
blocks localhost, loopback, private, link-local, reserved, and other non-public network targets by default;
disables automatic redirect following and validates each redirect target before requesting it;
adds --allow-private-network / allow_private_network=True as an explicit opt-in for trusted internal schema endpoints.

Remote $ref fetching remains controlled by --allow-remote-refs; non-public/internal targets additionally require --allow-private-network.

Submitted by: Hamza Haroon (thegr1ffyn)

Severity

8.2 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.60.2"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "datamodel-code-generator"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.9.1"
            },
            {
              "fixed": "0.61.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54691"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-28T21:30:18Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\n\n`datamodel-code-generator`\u0027s built-in HTTP fetcher (`http.get_body`) issues an `httpx.GET` against any URL passed to `--url` (or reached via a redirect chain) with **no allow-list, no deny-list, no IP/host validation, and `follow_redirects=True`**. Loopback addresses, RFC1918 ranges, link-local (`169.254.169.254` cloud metadata), unique-local IPv6 and any other network-accessible target are all reachable. The JSON/YAML response body is parsed as a schema and reflected into the generated `.py` source, exfiltrating the response to anyone with access to that file (commonly committed to a repository).\n\n### Details\n\nSink: `src/datamodel_code_generator/http.py`, `get_body` (lines 31\u201361, at tag `0.60.1` / commit `a321547e`):\n\n```python\ndef get_body(url, headers=None, ignore_tls=False,\n             query_parameters=None, timeout=DEFAULT_HTTP_TIMEOUT) -\u003e str:\n    httpx = _get_httpx()\n    try:\n        response = httpx.get(\n            url,\n            headers=headers,\n            verify=not ignore_tls,\n            follow_redirects=True,          # (A)\n            params=query_parameters,\n            timeout=timeout,\n        )\n    except Exception as e:\n        ...\n    if response.status_code \u003e= 400:\n        ...\n    content_type = response.headers.get(\"content-type\", \"\").lower()\n    if \"text/html\" in content_type:\n        raise SchemaFetchError(...)         # (B) \u2014 only filter\n    return response.text                    # (C) \u2192 embedded in generated.py\n```\n\n- (A) follows redirects unconditionally \u2014 a public URL \u2192 302 \u2192 internal address chain works.\n- (B) the only filter is rejecting `text/html`. Non-HTML internal endpoints (JSON APIs, cloud metadata, admin services) pass through.\n- (C) the response body becomes the schema; its `title`, `description`, `properties`, etc. land in the generated `.py` as class attributes and `Field(description=...)` strings.\n\n`get_body` is called by `parser/base.py:1326` (`_get_text_from_url`), which is reached from CLI argument `--url \u003cURL\u003e`. (The `$ref` path is a separate advisory \u2014 see GHSA-D.)\n\nOnly affects users who installed the `[http]` extra (`pip install \u0027datamodel-code-generator[http]\u0027`).\n\n### PoC\n\nA self-contained one-file PoC available here:\nhttps://gist.github.com/thegr1ffyn/18de777d6c800a3b47715425e3f3e8f5\n\n### Impact\n\n**Who is impacted.** Anyone who runs `datamodel-codegen` with a `--url` they didn\u0027t fully verify, or who runs it inside a network with reachable internal services. Realistic scenarios:\n\n1. **Trojan documentation / README.** A blog post or README example reads `datamodel-codegen --url https://schemas.example.com/user.json -o user.py`. The attacker controls `example.com`, redirects to `http://169.254.169.254/latest/meta-data/iam/security-credentials/\u003crole\u003e`, and the IAM credentials end up as a docstring in `user.py`.\n2. **Internal port scan / disclosure.** Iterating `--url http://127.0.0.1:\u003cport\u003e/health` probes localhost services; non-HTML, non-error responses confirm a service and leak its body into the generated file.\n3. **CI poisoning.** A PR adds a Makefile rule that calls `datamodel-codegen --url $(SCHEMA_URL)`; the CI runner reaches every internal service in its VPC and the response lands in PR artifacts.\n\n**Suggested fix.** Resolve the URL host, reject loopback / private / link-local / multicast / reserved IPs by default, disable redirects by default (`follow_redirects=False`), re-validate after each redirect if the user opts into following them, and add an `--allow-private-network` flag for opt-in legitimate use.\n\n### Maintainer resolution\n\nThis report was fixed together with GHSA-954p-556p-r752 by the private security PR koxudaxi/datamodel-code-generator-ghsa-rfr2-mq9m-x2qx#1, merged into the public repository as 5fdba4a09f2d7a9996a504975b7ef7d63e3715bb. Follow-up generated-file and coverage fixes were merged in koxudaxi/datamodel-code-generator#3279 and docs were synced in #3280. The patched release is 0.61.0.\n\nThe patch hardens the shared HTTP fetcher used by both direct CLI `--url` fetching and remote JSON Schema/OpenAPI `$ref` resolution:\n\n- validates HTTP(S) URLs before fetching;\n- blocks localhost, loopback, private, link-local, reserved, and other non-public network targets by default;\n- disables automatic redirect following and validates each redirect target before requesting it;\n- adds `--allow-private-network` / `allow_private_network=True` as an explicit opt-in for trusted internal schema endpoints.\n\nRemote `$ref` fetching remains controlled by `--allow-remote-refs`; non-public/internal targets additionally require `--allow-private-network`.\n\nSubmitted by: Hamza Haroon (thegr1ffyn)",
  "id": "GHSA-rfr2-mq9m-x2qx",
  "modified": "2026-07-28T21:30:18Z",
  "published": "2026-07-28T21:30:18Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/koxudaxi/datamodel-code-generator/security/advisories/GHSA-rfr2-mq9m-x2qx"
    },
    {
      "type": "WEB",
      "url": "https://github.com/koxudaxi/datamodel-code-generator/commit/5fdba4a09f2d7a9996a504975b7ef7d63e3715bb"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/koxudaxi/datamodel-code-generator"
    },
    {
      "type": "WEB",
      "url": "https://github.com/koxudaxi/datamodel-code-generator/releases/tag/0.61.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "datamodel-code-generator vulnerable to SSRF via --url: no host/IP validation, follows redirects"
}

PYSEC-2026-3564

Vulnerability from pysec - Published: 2026-08-04 11:34 - Updated: 2026-08-04 13:36

Details

Summary

Details

Sink: src/datamodel_code_generator/http.py, get_body (lines 31–61, at tag 0.60.1 / commit a321547e):

def get_body(url, headers=None, ignore_tls=False,
             query_parameters=None, timeout=DEFAULT_HTTP_TIMEOUT) -> str:
    httpx = _get_httpx()
    try:
        response = httpx.get(
            url,
            headers=headers,
            verify=not ignore_tls,
            follow_redirects=True,          # (A)
            params=query_parameters,
            timeout=timeout,
        )
    except Exception as e:
        ...
    if response.status_code >= 400:
        ...
    content_type = response.headers.get("content-type", "").lower()
    if "text/html" in content_type:
        raise SchemaFetchError(...)         # (B) — only filter
    return response.text                    # (C) → embedded in generated.py

(A) follows redirects unconditionally — a public URL → 302 → internal address chain works.
(B) the only filter is rejecting text/html. Non-HTML internal endpoints (JSON APIs, cloud metadata, admin services) pass through.
(C) the response body becomes the schema; its title, description, properties, etc. land in the generated .py as class attributes and Field(description=...) strings.

get_body is called by parser/base.py:1326 (_get_text_from_url), which is reached from CLI argument --url <URL>. (The $ref path is a separate advisory — see GHSA-D.)

Only affects users who installed the [http] extra (pip install 'datamodel-code-generator[http]').

PoC

A self-contained one-file PoC available here: https://gist.github.com/thegr1ffyn/18de777d6c800a3b47715425e3f3e8f5

Impact

Who is impacted. Anyone who runs datamodel-codegen with a --url they didn't fully verify, or who runs it inside a network with reachable internal services. Realistic scenarios:

Trojan documentation / README. A blog post or README example reads datamodel-codegen --url https://schemas.example.com/user.json -o user.py. The attacker controls example.com, redirects to http://169.254.169.254/latest/meta-data/iam/security-credentials/<role>, and the IAM credentials end up as a docstring in user.py.
Internal port scan / disclosure. Iterating --url http://127.0.0.1:<port>/health probes localhost services; non-HTML, non-error responses confirm a service and leak its body into the generated file.
CI poisoning. A PR adds a Makefile rule that calls datamodel-codegen --url $(SCHEMA_URL); the CI runner reaches every internal service in its VPC and the response lands in PR artifacts.

Maintainer resolution

The patch hardens the shared HTTP fetcher used by both direct CLI --url fetching and remote JSON Schema/OpenAPI $ref resolution:

validates HTTP(S) URLs before fetching;
blocks localhost, loopback, private, link-local, reserved, and other non-public network targets by default;
disables automatic redirect following and validates each redirect target before requesting it;
adds --allow-private-network / allow_private_network=True as an explicit opt-in for trusted internal schema endpoints.

Remote $ref fetching remains controlled by --allow-remote-refs; non-public/internal targets additionally require --allow-private-network.

Submitted by: Hamza Haroon (thegr1ffyn)

Severity

8.2 (High)


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

Impacted products

Name	purl
datamodel-code-generator	pkg:pypi/datamodel-code-generator

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "datamodel-code-generator",
        "purl": "pkg:pypi/datamodel-code-generator"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.9.1"
            },
            {
              "fixed": "0.61.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.0",
        "0.10.1",
        "0.10.2",
        "0.10.3",
        "0.11.0",
        "0.11.1",
        "0.11.10",
        "0.11.11",
        "0.11.12",
        "0.11.13",
        "0.11.14",
        "0.11.15",
        "0.11.16",
        "0.11.17",
        "0.11.18",
        "0.11.19",
        "0.11.2",
        "0.11.20",
        "0.11.3",
        "0.11.4",
        "0.11.5",
        "0.11.6",
        "0.11.7",
        "0.11.8",
        "0.11.9",
        "0.12.0",
        "0.12.1",
        "0.12.2",
        "0.12.3",
        "0.13.0",
        "0.13.1",
        "0.13.2",
        "0.13.3",
        "0.13.4",
        "0.13.5",
        "0.14.0",
        "0.14.1",
        "0.15.0",
        "0.16.0",
        "0.16.1",
        "0.17.0",
        "0.17.1",
        "0.17.2",
        "0.18.0",
        "0.18.1",
        "0.19.0",
        "0.20.0",
        "0.21.0",
        "0.21.1",
        "0.21.2",
        "0.21.3",
        "0.21.4",
        "0.21.5",
        "0.22.0",
        "0.22.1",
        "0.23.0",
        "0.24.0",
        "0.24.1",
        "0.24.2",
        "0.25.0",
        "0.25.1",
        "0.25.2",
        "0.25.3",
        "0.25.4",
        "0.25.5",
        "0.25.6",
        "0.25.7",
        "0.25.8",
        "0.25.9",
        "0.26.0",
        "0.26.1",
        "0.26.2",
        "0.26.3",
        "0.26.4",
        "0.26.5",
        "0.27.0",
        "0.27.1",
        "0.27.2",
        "0.27.3",
        "0.28.0",
        "0.28.1",
        "0.28.2",
        "0.28.3",
        "0.28.4",
        "0.28.5",
        "0.29.0",
        "0.30.0",
        "0.30.1",
        "0.30.2",
        "0.31.0",
        "0.31.1",
        "0.31.2",
        "0.32.0",
        "0.33.0",
        "0.34.0",
        "0.35.0",
        "0.36.0",
        "0.37.0",
        "0.38.0",
        "0.39.0",
        "0.40.0",
        "0.41.0",
        "0.42.0",
        "0.42.1",
        "0.42.2",
        "0.43.0",
        "0.43.1",
        "0.44.0",
        "0.45.0",
        "0.46.0",
        "0.47.0",
        "0.48.0",
        "0.49.0",
        "0.50.0",
        "0.51.0",
        "0.52.0",
        "0.52.1",
        "0.52.2",
        "0.53.0",
        "0.54.0",
        "0.54.1",
        "0.55.0",
        "0.56.0",
        "0.56.1",
        "0.57.0",
        "0.58.0",
        "0.59.0",
        "0.59.1",
        "0.60.0",
        "0.60.1",
        "0.60.2",
        "0.9.1",
        "0.9.2",
        "0.9.3",
        "0.9.4"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54691",
    "GHSA-rfr2-mq9m-x2qx"
  ],
  "details": "### Summary\n\n`datamodel-code-generator`\u0027s built-in HTTP fetcher (`http.get_body`) issues an `httpx.GET` against any URL passed to `--url` (or reached via a redirect chain) with **no allow-list, no deny-list, no IP/host validation, and `follow_redirects=True`**. Loopback addresses, RFC1918 ranges, link-local (`169.254.169.254` cloud metadata), unique-local IPv6 and any other network-accessible target are all reachable. The JSON/YAML response body is parsed as a schema and reflected into the generated `.py` source, exfiltrating the response to anyone with access to that file (commonly committed to a repository).\n\n### Details\n\nSink: `src/datamodel_code_generator/http.py`, `get_body` (lines 31\u201361, at tag `0.60.1` / commit `a321547e`):\n\n```python\ndef get_body(url, headers=None, ignore_tls=False,\n             query_parameters=None, timeout=DEFAULT_HTTP_TIMEOUT) -\u003e str:\n    httpx = _get_httpx()\n    try:\n        response = httpx.get(\n            url,\n            headers=headers,\n            verify=not ignore_tls,\n            follow_redirects=True,          # (A)\n            params=query_parameters,\n            timeout=timeout,\n        )\n    except Exception as e:\n        ...\n    if response.status_code \u003e= 400:\n        ...\n    content_type = response.headers.get(\"content-type\", \"\").lower()\n    if \"text/html\" in content_type:\n        raise SchemaFetchError(...)         # (B) \u2014 only filter\n    return response.text                    # (C) \u2192 embedded in generated.py\n```\n\n- (A) follows redirects unconditionally \u2014 a public URL \u2192 302 \u2192 internal address chain works.\n- (B) the only filter is rejecting `text/html`. Non-HTML internal endpoints (JSON APIs, cloud metadata, admin services) pass through.\n- (C) the response body becomes the schema; its `title`, `description`, `properties`, etc. land in the generated `.py` as class attributes and `Field(description=...)` strings.\n\n`get_body` is called by `parser/base.py:1326` (`_get_text_from_url`), which is reached from CLI argument `--url \u003cURL\u003e`. (The `$ref` path is a separate advisory \u2014 see GHSA-D.)\n\nOnly affects users who installed the `[http]` extra (`pip install \u0027datamodel-code-generator[http]\u0027`).\n\n### PoC\n\nA self-contained one-file PoC available here:\nhttps://gist.github.com/thegr1ffyn/18de777d6c800a3b47715425e3f3e8f5\n\n### Impact\n\n**Who is impacted.** Anyone who runs `datamodel-codegen` with a `--url` they didn\u0027t fully verify, or who runs it inside a network with reachable internal services. Realistic scenarios:\n\n1. **Trojan documentation / README.** A blog post or README example reads `datamodel-codegen --url https://schemas.example.com/user.json -o user.py`. The attacker controls `example.com`, redirects to `http://169.254.169.254/latest/meta-data/iam/security-credentials/\u003crole\u003e`, and the IAM credentials end up as a docstring in `user.py`.\n2. **Internal port scan / disclosure.** Iterating `--url http://127.0.0.1:\u003cport\u003e/health` probes localhost services; non-HTML, non-error responses confirm a service and leak its body into the generated file.\n3. **CI poisoning.** A PR adds a Makefile rule that calls `datamodel-codegen --url $(SCHEMA_URL)`; the CI runner reaches every internal service in its VPC and the response lands in PR artifacts.\n\n**Suggested fix.** Resolve the URL host, reject loopback / private / link-local / multicast / reserved IPs by default, disable redirects by default (`follow_redirects=False`), re-validate after each redirect if the user opts into following them, and add an `--allow-private-network` flag for opt-in legitimate use.\n\n### Maintainer resolution\n\nThis report was fixed together with GHSA-954p-556p-r752 by the private security PR koxudaxi/datamodel-code-generator-ghsa-rfr2-mq9m-x2qx#1, merged into the public repository as 5fdba4a09f2d7a9996a504975b7ef7d63e3715bb. Follow-up generated-file and coverage fixes were merged in koxudaxi/datamodel-code-generator#3279 and docs were synced in #3280. The patched release is 0.61.0.\n\nThe patch hardens the shared HTTP fetcher used by both direct CLI `--url` fetching and remote JSON Schema/OpenAPI `$ref` resolution:\n\n- validates HTTP(S) URLs before fetching;\n- blocks localhost, loopback, private, link-local, reserved, and other non-public network targets by default;\n- disables automatic redirect following and validates each redirect target before requesting it;\n- adds `--allow-private-network` / `allow_private_network=True` as an explicit opt-in for trusted internal schema endpoints.\n\nRemote `$ref` fetching remains controlled by `--allow-remote-refs`; non-public/internal targets additionally require `--allow-private-network`.\n\nSubmitted by: Hamza Haroon (thegr1ffyn)",
  "id": "PYSEC-2026-3564",
  "modified": "2026-08-04T13:36:16.026867Z",
  "published": "2026-08-04T11:34:44.095724Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/koxudaxi/datamodel-code-generator/security/advisories/GHSA-rfr2-mq9m-x2qx"
    },
    {
      "type": "WEB",
      "url": "https://github.com/koxudaxi/datamodel-code-generator/commit/5fdba4a09f2d7a9996a504975b7ef7d63e3715bb"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/koxudaxi/datamodel-code-generator"
    },
    {
      "type": "WEB",
      "url": "https://github.com/koxudaxi/datamodel-code-generator/releases/tag/0.61.0"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/datamodel-code-generator"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-rfr2-mq9m-x2qx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54691"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "datamodel-code-generator vulnerable to SSRF via --url: no host/IP validation, follows redirects"
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.

Related by attack behaviour

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.

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CVE-2026-54691 (GCVE-0-2026-54691)

FKIE_CVE-2026-54691

GHSA-RFR2-MQ9M-X2QX

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PoC

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Maintainer resolution

PYSEC-2026-3564

Summary

Details

PoC

Impact

Maintainer resolution

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Vulnerability timeline

Related by attack behaviour