{"id":"GHSA-6437-gxhq-pqv8","summary":"Orval: Import-time RCE via header parameter name -\u003e 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) -\u003e 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.","aliases":["CVE-2026-71864"],"modified":"2026-09-18T05:30:05.782459127Z","published":"2026-09-03T18:08:31Z","database_specific":{"nvd_published_at":"2026-08-19T18:17:23Z","cwe_ids":["CWE-116","CWE-94","CWE-95"],"severity":"CRITICAL","github_reviewed":true,"github_reviewed_at":"2026-09-03T18:08:31Z"},"references":[{"type":"WEB","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":"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-6437-gxhq-pqv8/GHSA-6437-gxhq-pqv8.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"}]}