Vulnerability-Lookup

GHSA-5293-MQ8X-G3XJ

Vulnerability from github – Published: 2026-10-06 15:32 – Updated: 2026-10-06 15:32

Summary

openapi-python-client: Malicious OpenAPI Documents can cause Arbitrary Code Generation

Details

Impact

A malicious OpenAPI document processed by any openapi-python-client prior to 0.29.1 can generate arbitrary Python code. When anyone imports the malicious client, that arbitrary Python code will execute.

Patches

Versions starting with 0.29.1 have updated with guardrails to prevent arbitrary code generation. Upgrade to this version immediately and audit any code previously generated from untrusted documents.

Workarounds

Do not generate clients for documents you don't completely trust. Carefully verify any existing generated code from untrusted documents.

Severity

8.4 (High)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "openapi-python-client"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.29.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-105801"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-116",
      "CWE-150",
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-06T15:32:53Z",
    "nvd_published_at": "2026-10-06T15:17:17Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nA malicious OpenAPI document processed by any `openapi-python-client` prior to 0.29.1 can generate arbitrary Python code. When anyone imports the malicious client, that arbitrary Python code will execute.\n\n### Patches\nVersions starting with 0.29.1 have updated with guardrails to prevent arbitrary code generation. Upgrade to this version immediately and audit any code previously generated from untrusted documents.\n\n### Workarounds\nDo not generate clients for documents you don\u0027t completely trust. Carefully verify any existing generated code from untrusted documents.",
  "id": "GHSA-5293-mq8x-g3xj",
  "modified": "2026-10-06T15:32:53Z",
  "published": "2026-10-06T15:32:53Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openapi-generators/openapi-python-client/security/advisories/GHSA-5293-mq8x-g3xj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-105801"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openapi-generators/openapi-python-client/pull/1483"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openapi-generators/openapi-python-client/commit/1c99af478892e5bbe6583b92acba431c9dec9186"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/openapi-generators/openapi-python-client"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openapi-generators/openapi-python-client/releases/tag/v0.29.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "openapi-python-client: Malicious OpenAPI Documents can cause Arbitrary Code Generation"
}

CVE-2026-105801 (GCVE-0-2026-105801)

Vulnerability from cvelistv5 – Published: 2026-10-06 14:53 – Updated: 2026-10-06 14:53

Title

openapi-python-client: Malicious OpenAPI Documents can cause Arbitrary Code Generation

Summary

openapi-python-client generates Python clients from OpenAPI documents. Prior to 0.29.1, the generator does not safely neutralize malicious OpenAPI document content before rendering string, docstring, and f-string contexts in generated Python. The generated Python client can contain attacker-controlled Python that executes when a user imports the client, affecting the importing environment's integrity and potentially its confidentiality and availability. This issue is fixed in version 0.29.1.

Severity

8.4 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')
CWE-116 - Improper Encoding or Escaping of Output
CWE-150 - Improper Neutralization of Escape, Meta, or Control Sequences

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7553 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/openapi-generators/openapi-pyt…	x_refsource_CONFIRM
https://github.com/openapi-generators/openapi-pyt…	x_refsource_MISC
https://github.com/openapi-generators/openapi-pyt…	x_refsource_MISC
https://github.com/openapi-generators/openapi-pyt…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
openapi-generators	openapi-python-client	Affected: < 0.29.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "openapi-python-client",
          "vendor": "openapi-generators",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.29.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "openapi-python-client generates Python clients from OpenAPI documents. Prior to 0.29.1, the generator does not safely neutralize malicious OpenAPI document content before rendering string, docstring, and f-string contexts in generated Python. The generated Python client can contain attacker-controlled Python that executes when a user imports the client, affecting the importing environment\u0027s integrity and potentially its confidentiality and availability. This issue is fixed in version 0.29.1."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-94",
              "description": "CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-116",
              "description": "CWE-116: Improper Encoding or Escaping of Output",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-150",
              "description": "CWE-150: Improper Neutralization of Escape, Meta, or Control Sequences",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-06T14:53:42.461Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/openapi-generators/openapi-python-client/security/advisories/GHSA-5293-mq8x-g3xj",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/openapi-generators/openapi-python-client/security/advisories/GHSA-5293-mq8x-g3xj"
        },
        {
          "name": "https://github.com/openapi-generators/openapi-python-client/pull/1483",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openapi-generators/openapi-python-client/pull/1483"
        },
        {
          "name": "https://github.com/openapi-generators/openapi-python-client/commit/1c99af478892e5bbe6583b92acba431c9dec9186",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openapi-generators/openapi-python-client/commit/1c99af478892e5bbe6583b92acba431c9dec9186"
        },
        {
          "name": "https://github.com/openapi-generators/openapi-python-client/releases/tag/v0.29.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openapi-generators/openapi-python-client/releases/tag/v0.29.1"
        }
      ],
      "source": {
        "advisory": "GHSA-5293-mq8x-g3xj",
        "discovery": "UNKNOWN"
      },
      "title": "openapi-python-client: Malicious OpenAPI Documents can cause Arbitrary Code Generation"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-105801",
    "datePublished": "2026-10-06T14:53:42.461Z",
    "dateReserved": "2026-10-05T20:37:19.364Z",
    "dateUpdated": "2026-10-06T14:53:42.461Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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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