Vulnerability-Lookup

GHSA-6MR6-JVCR-2F25

Vulnerability from github – Published: 2026-09-02 14:52 – Updated: 2026-09-02 14:52

Summary

Orval: Import-time RCE via schema property name -> computed-property-key injection in the zod client

Details

Summary

orval's zod client emits each schema property name as a double-quoted key in the generated zod.object({...}) WITHOUT escaping the double quote. A " in a property name closes the key and lands in object-literal context, where an injected computed property key [expr] is evaluated when zod.object({...}) runs -- which is at MODULE IMPORT (the export const X = zod.object({...}) executes on load) -> import-time RCE. The property name is a pure data field. Verified on orval 8.19.0 / Node. CWE-94 / CWE-95 / CWE-116.

Details

export const OpBody = zod.object({ "a":zod.string(),[require("fs").writeFileSync("PWNED","")]:zod.string(),"b": zod.string().optional() })

Sibling: the MSW mock uses a single-quoted key (' breakout, call-time) -- separate report. The TS interface key is a type (DoS only). Distinct from orval's $ref / route-path / server-url / zod-default findings.

PoC

reproduce.sh (+ make_spec.py) attached: a property name a":zod.string(),[require("fs").writeFileSync("","")]:zod.string(),"b -> zod.object; evaluating it (= importing the module) writes the marker. Verified on 8.19.0.

Impact

JavaScript / OS command execution (via child_process) at import time for anyone who generates an orval zod client from an attacker-controlled spec and imports it. Estimated Critical, e.g. CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N.

Suggested fix

Escape the property name for the JS string key (JSON.stringify) in the zod.object key generation; never interpolate a raw property name adjacent to [ ] in object-literal position. maintainer-report.txt make_spec.py reproduce.sh

Severity

9.3 (Critical)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "orval"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.21.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-71866"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-89",
      "CWE-95"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-02T14:52:56Z",
    "nvd_published_at": "2026-08-19T18:17:23Z",
    "severity": "CRITICAL"
  },
  "details": "### Summary\n\norval\u0027s zod client emits each schema property name as a double-quoted key in the generated zod.object({...})\nWITHOUT escaping the double quote. A \" in a property name closes the key and lands in object-literal\ncontext, where an injected computed property key [expr] is evaluated when zod.object({...}) runs -- which\nis at MODULE IMPORT (the `export const X = zod.object({...})` executes on load) -\u003e import-time RCE. The\nproperty name is a pure data field. Verified on orval 8.19.0 / Node. CWE-94 / CWE-95 / CWE-116.\n\n### Details\n\n```ts\nexport const OpBody = zod.object({ \"a\":zod.string(),[require(\"fs\").writeFileSync(\"PWNED\",\"\")]:zod.string(),\"b\": zod.string().optional() })\n```\n\nSibling: the MSW mock uses a single-quoted key (\u0027 breakout, call-time) -- separate report. The TS interface\nkey is a type (DoS only). Distinct from orval\u0027s $ref / route-path / server-url / zod-default findings.\n\n### PoC\n\nreproduce.sh (+ make_spec.py) attached: a property name a\":zod.string(),[require(\"fs\").writeFileSync(\"\u003cmarker\u003e\",\"\")]:zod.string(),\"b\n-\u003e zod.object; evaluating it (= importing the module) writes the marker. Verified on 8.19.0.\n\n### Impact\n\nJavaScript / OS command execution (via child_process) at import time for anyone who generates an orval zod\nclient from an attacker-controlled spec and imports it. Estimated Critical, e.g.\n`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`.\n\n### Suggested fix\n\nEscape the property name for the JS string key (JSON.stringify) in the zod.object key generation; never\ninterpolate a raw property name adjacent to [ ] in object-literal position.\n[maintainer-report.txt](https://github.com/user-attachments/files/29426038/maintainer-report.txt)\n[make_spec.py](https://github.com/user-attachments/files/29426039/make_spec.py)\n[reproduce.sh](https://github.com/user-attachments/files/29426040/reproduce.sh)",
  "id": "GHSA-6mr6-jvcr-2f25",
  "modified": "2026-09-02T14:52:56Z",
  "published": "2026-09-02T14:52:56Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/orval-labs/orval/security/advisories/GHSA-6mr6-jvcr-2f25"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71866"
    },
    {
      "type": "WEB",
      "url": "https://github.com/orval-labs/orval/pull/3692"
    },
    {
      "type": "WEB",
      "url": "https://github.com/orval-labs/orval/commit/8ef1bfdf3f9bcaf9dabfbe2e42887f1c0e159ab6"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/orval-labs/orval"
    },
    {
      "type": "WEB",
      "url": "https://github.com/orval-labs/orval/releases/tag/v8.21.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Orval: Import-time RCE via schema property name -\u003e computed-property-key injection in the zod client"
}

CVE-2026-71866 (GCVE-0-2026-71866)

Vulnerability from cvelistv5 – Published: 2026-08-19 17:27 – Updated: 2026-08-19 18:03

Title

Orval: Import-time RCE via schema property name -> computed-property-key injection in the zod client

Summary

Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. From version 8.19.0 until 8.21.0, a double quote in a schema property name is emitted into the generated zod.object({...}) schema without safe encoding. This permits attacker-controlled JavaScript to be evaluated when the generated zod schema module is imported, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/zod/src/index.ts and zod object-key generation. This issue is fixed in version 8.21.0.

Severity

9.3 (Critical)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 18:03 UTC

CWE

CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CWE-95 - Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/orval-labs/orval/security/advi…	x_refsource_CONFIRM
https://github.com/orval-labs/orval/pull/3692	x_refsource_MISC
https://github.com/orval-labs/orval/commit/8ef1bf…	x_refsource_MISC
https://github.com/orval-labs/orval/releases/tag/…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
orval-labs	orval	Affected: < 8.21.0

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-71866",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-19T18:03:07.666085Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-19T18:03:13.730Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/orval-labs/orval/security/advisories/GHSA-6mr6-jvcr-2f25"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "orval",
          "vendor": "orval-labs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 8.21.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. From version 8.19.0 until 8.21.0, a double quote in a schema property name is emitted into the generated zod.object({...}) schema without safe encoding. This permits attacker-controlled JavaScript to be evaluated when the generated zod schema module is imported, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/zod/src/index.ts and zod object-key generation. This issue is fixed in version 8.21.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-89",
              "description": "CWE-89: Improper Neutralization of Special Elements used in an SQL Command (\u0027SQL Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-95",
              "description": "CWE-95: Improper Neutralization of Directives in Dynamically Evaluated Code (\u0027Eval Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T17:27:28.222Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      "references": [
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          "url": "https://github.com/orval-labs/orval/security/advisories/GHSA-6mr6-jvcr-2f25"
        },
        {
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          "tags": [
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          "url": "https://github.com/orval-labs/orval/pull/3692"
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          "url": "https://github.com/orval-labs/orval/releases/tag/v8.21.0"
        }
      ],
      "source": {
        "advisory": "GHSA-6mr6-jvcr-2f25",
        "discovery": "UNKNOWN"
      },
      "title": "Orval: Import-time RCE via schema property name -\u003e computed-property-key injection in the zod client"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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    "cveId": "CVE-2026-71866",
    "datePublished": "2026-08-19T17:27:28.222Z",
    "dateReserved": "2026-08-07T18:26:53.524Z",
    "dateUpdated": "2026-08-19T18:03:13.730Z",
    "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.

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.
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

GHSA-6MR6-JVCR-2F25

Summary

Details

PoC

Impact

Suggested fix

CVE-2026-71866 (GCVE-0-2026-71866)

Tags

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Nomenclature

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