{"id":"CVE-2026-71869","aliases":["GHSA-2h9g-j24r-h63g"],"url":"https://o3.security/vulnerability/CVE-2026-71869","summary":"Orval: Import-time RCE via array-items default -> zod module-level template literal","details":"### Summary\n\nOrval's zod schema generation emits the **array-items** `default` value as a module-level template literal (`export const …Default = `<default>`;`) without escaping `${` or the backtick. A default of the form `v${<code>}w` injects a live JavaScript expression evaluated when the generated zod schema module is imported, executing attacker-controlled code at import — no request or function call needed. Verified on Orval 8.19.0; survives default OpenAPI validation.\n\n### Details\n\n```ts\nexport const …Default = `v${globalThis.ORVPWN()}w`;   // ${...} = arbitrary JS expression, runs at import\n```\n\nMalicious input: an array property (string items) with a `default` of `v${<attacker JS>}w`. `${...}` permits any JS expression.\n\nNote: this is one of several `default`-bearing positions that reach the same unescaped zod template-literal sink; a single fix (escape `default` values) closes all of them, and a CNA may choose to consolidate the related reports.\n\n### PoC\n\n`reproduce.sh` (+ `make_spec.py`) attached: generates the zod schema with default validation, bundles it, imports it, and shows a marker written at import. Verified on 8.19.0.\n\n### Impact\n\nCode execution at import in any application that imports a zod schema module generated from an attacker-controlled or attacker-influenced OpenAPI description.\n\n### Suggested fix\n\nEmit `default` values via a proper string-literal encoder (JSON.stringify, or escape backtick and `${` if a template literal must be used); never interpolate a spec value into a template literal. Apply to every `default` position. [maintainer-report.txt](https://github.com/user-attachments/files/29399151/maintainer-report.txt) [make_spec.py](https://github.com/user-attachments/files/29399152/make_spec.py)[reproduce.sh](https://github.com/user-attachments/files/29399153/reproduce.sh)","published":"2026-08-19T17:36:06.800Z","modified":"2026-09-11T03:30:13.511051022Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"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-2026-71869.json"},{"type":"ADVISORY","url":"https://github.com/orval-labs/orval/security/advisories/GHSA-2h9g-j24r-h63g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71869"},{"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":"2026-09-11T03:30:13.511051022Z"}}