CVE-2026-71867: Orval Remote Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-2w86-xfrc-g85r
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CWE-89 CWE-95
Published
Advisory Summary

CVE-2026-71867 is a CRITICAL remote code execution vulnerability (CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')) affecting Orval libraries in the npm ecosystem. The issue involves rce via schema property name -> computed-property-key injection in the msw mock generator. Remediation is available by upgrading affected packages to version 8.21.0.

CVE-2026-71867 at a Glance

CVE Identifier CVE-2026-71867
GHSA Identifier GHSA-2w86-xfrc-g85r
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Affected Product Orval
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-71867

To remediate this vulnerability, upgrade all affected Orval dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

orval fixed: 8.21.0 
npm install orval@8.21.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls orval

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-71867, inspect your project dependencies using npm:

npm ls orval

Analyze the terminal output to locate any version of Orval in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 8.21.0), your application is affected.

Note: The npm ls orval command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection'), where the product constructs all or part of an sql command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended sql command when it is sent to a downstream component. without sufficient removal or quoting of sql syntax in user-controllable inputs, the generated sql query can cause those inputs to be interpreted as sql instead of ordinary user data. In Orval, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary orval, when generating MSW mocks (output.mock: true), emits each schema property name as a single-quoted object key in the mock factory WITHOUT escaping the single 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 the mock factory is called (e.g. in tests / MSW handlers) -> RCE. The property name is a pure data field. Verified on orval 8.19.0 / Node. ### Details ```ts export const getOpResponseMock = (...): Thing => ({'x': 0, [require("fs").writeFileSync("PWNED","")]: 0, 'y': faker...., ...overrideResponse}); ``` Safe elsewhere: the zod schema double-quotes the property name; 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 `x': 0, [require("fs").writeFileSync("<marker>","")]: 0, 'y` -> mock object literal; calling the mock factory writes the marker. Verified on 8.19.0. ### Impact JavaScript / OS command execution (via child_process) on the machine of anyone who generates orval mocks from an attacker controlled spec and runs them (tests / MSW). ### Suggested fix Escape the property name for the JS string key (JSON.stringify), and never interpolate a raw property name adjacent to [ ] in object-literal position.

CVE-2026-71867 Affected Orval Versions

1 component(s)
Fixed Versions:
8.21.0
Product / Package Ecosystem Affected Versions Fixed Version
orval
npm/orval
npm
< 8.21.0
8.21.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/orval-labs/orval/security/advisories/GHSA-2w86-xfrc-g85r
NVD — CVE-2026-71867 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-71867
Orval Source Repository REPOSITORY
https://github.com/orval-labs/orval/pull/3692
Security Fix Commit FIX COMMIT
https://github.com/orval-labs/orval/commit/8ef1bfdf3f9bcaf9dabfbe2e42887f1c0e159ab6
Orval Source Repository REPOSITORY
https://github.com/orval-labs/orval
Orval Release RELEASE
https://github.com/orval-labs/orval/releases/tag/v8.21.0

Frequently Asked Questions

What is CVE-2026-71867?
CVE-2026-71867 is a security vulnerability in Orval involving RCE via schema property name -> computed-property-key injection in the MSW mock generator under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection').
Which Orval versions are affected?
Affected versions include releases prior to 8.21.0 across affected packages: orval.
What version fixes CVE-2026-71867?
Upgrading to 8.21.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is orval affected?
Yes, orval is affected in releases prior to 8.21.0. Upgrade your dependency to 8.21.0 or later.
What CWE is associated with CVE-2026-71867?
CVE-2026-71867 is classified under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') (The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.).
How can I check npm dependencies for CVE-2026-71867?
Run the dependency tree command: 'npm ls orval'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2w86-xfrc-g85r",
  "modified" : "2026-09-03T18:26:12Z",
  "published" : "2026-09-03T18:26:12Z",
  "aliases" : [ "CVE-2026-71867" ],
  "summary" : "Orval: RCE via schema property name -> computed-property-key injection in the MSW mock generator",
  "details" : "### Summary\n\norval, when generating MSW mocks (output.mock: true), emits each schema property name as a single-quoted object key in the mock factory WITHOUT escaping the single 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 the mock factory is called (e.g. in tests / MSW handlers) -> RCE. The property name is a pure data field. Verified on orval 8.19.0 / Node. \n\n### Details\n\n```ts\nexport const getOpResponseMock = (...): Thing => ({'x': 0, [require(\"fs\").writeFileSync(\"PWNED\",\"\")]: 0, 'y': faker...., ...overrideResponse});\n```\n\nSafe elsewhere: the zod schema double-quotes the property name; the TS interface key is a type (DoS only). Distinct from orval's $ref / route-path / server-url / zod-default findings.\n\n### PoC\n\nreproduce.sh (+ make_spec.py) attached: a property name `x': 0, [require(\"fs\").writeFileSync(\"<marker>\",\"\")]: 0, 'y` -> mock object literal; calling the mock factory writes the marker. Verified on 8.19.0.\n\n### Impact\n\nJavaScript / OS command execution (via child_process) on the machine of anyone who generates orval mocks from an attacker controlled spec and runs them (tests / MSW).\n\n### Suggested fix\n\nEscape the property name for the JS string key (JSON.stringify), and never interpolate a raw property name adjacent to [ ] in object-literal position.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "orval"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "8.21.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/orval-labs/orval/security/advisories/GHSA-2w86-xfrc-g85r"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-71867"
  }, {
    "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"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-89", "CWE-95" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-03T18:26:12Z",
    "nvd_published_at" : "2026-08-19T18:17:24Z"
  }
}