{"id":"CVE-2026-71864","aliases":["GHSA-6437-gxhq-pqv8"],"url":"https://o3.security/vulnerability/CVE-2026-71864","summary":"Orval: Import-time RCE via header parameter name -> computed-property-key injection in the zod client","details":"### Summary\n\norval's zod client emits each header parameter name as a double-quoted key in the generated zod.object({...}) request-validation schema WITHOUT escaping the double quote. A \" in the header parameter name closes the key and lands in object-literal context, where an injected computed property key [expr] is evaluated when zod.object({...}) runs -- at MODULE IMPORT (export const OpHeader = zod.object({...}) executes on load) -> import-time RCE. The header parameter name is a pure data field. Verified on orval 8.19.0 / Node.\n\n### Details\n\nexport const OpHeader = zod.object({ \"a\":zod.string(),[require(\"fs\").writeFileSync(\"PWNED\",\"\")]:zod.string(),\"b\": ... })\n\nAlso affects the hono client (reuses zod generation). orval escapes values in zod arrays but not keys in zod.object. Sibling fields: schema property name, query parameter name (CVE-96) (separate reports). Distinct from orval's $ref / route-path / server-url / zod-default findings.\n\n### PoC\n\nreproduce.sh (+ make_spec.py) attached: a header parameter name that breaks the zod.object key and injects a computed key; evaluating it (= importing the module) writes the marker. Verified on 8.19.0.\n\n### Impact\n\nJavaScript / OS command execution at import time for anyone who generates an orval zod client from an attacker-controlled spec and imports it. \n\n### Suggested fix\n\nEscape the header parameter name for the JS string key (JSON.stringify) in the zod.object key generation; never interpolate a raw name adjacent to [ ] in object-literal position.","published":"2026-08-19T17:34:55.340Z","modified":"2026-09-11T03:30:46.731326488Z","cvss":null,"epss":{"score":0.00607,"percentile":0.47466,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"orval","fixedVersion":"8.21.0"}],"fix":{"url":"https://github.com/orval-labs/orval/commit/8ef1bfdf3f9bcaf9dabfbe2e42887f1c0e159ab6","label":"orval-labs/orval@8ef1bfd"},"references":[{"type":"WEB","url":"https://github.com/orval-labs/orval/releases/tag/v8.21.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71864.json"},{"type":"ADVISORY","url":"https://github.com/orval-labs/orval/security/advisories/GHSA-6437-gxhq-pqv8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71864"},{"type":"FIX","url":"https://github.com/orval-labs/orval/commit/8ef1bfdf3f9bcaf9dabfbe2e42887f1c0e159ab6"},{"type":"FIX","url":"https://github.com/orval-labs/orval/pull/3692"},{"type":"PACKAGE","url":"https://github.com/orval-labs/orval"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-11T03:30:46.731326488Z"}}