{"id":"GHSA-6mr6-jvcr-2f25","summary":"Orval: Import-time RCE via schema property name -\u003e computed-property-key injection in the zod client","details":"### Summary\n\norval's 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 (' breakout, call-time) -- separate report. The TS interface\nkey 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 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)","aliases":["CVE-2026-71866"],"modified":"2026-09-02T15:00:09.981327180Z","published":"2026-09-02T14:52:56Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-09-02T14:52:56Z","nvd_published_at":"2026-08-19T18:17:23Z","cwe_ids":["CWE-89","CWE-95"],"severity":"CRITICAL"},"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"}],"affected":[{"package":{"name":"orval","ecosystem":"npm","purl":"pkg:npm/orval"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.21.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-6mr6-jvcr-2f25/GHSA-6mr6-jvcr-2f25.json"}}],"schema_version":"1.9.0","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"}]}