{"id":"CVE-2026-72717","aliases":["GHSA-w727-8j6c-2rj4"],"url":"https://o3.security/vulnerability/CVE-2026-72717","summary":"Orval: Import-time RCE via schema default -> zod module-level template literal","details":"### Summary\n\nOrval's zod schema generation emits a schema's `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 that is 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 getIResponseDsDefault = `v${globalThis.ORVPWN()}w`;\n```\n\n`${...}` permits an arbitrary JS expression. Orval escapes its other value sinks (enum, mock, regex, object-default values) with `\\'` inside single-quoted strings; the string `default` is the one value emitted as a backtick template literal, so `${...}`/backtick are interpreted, not escaped. Distinct from the URL-template-literal cases (different field and sink) and from the published Orval CVEs (summary/MCP, x-enumDescriptions, const/mock).\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. \n\n[maintainer-report.txt](https://github.com/user-attachments/files/29399048/maintainer-report.txt)\n[make_spec.py](https://github.com/user-attachments/files/29399049/make_spec.py)\n[reproduce.sh](https://github.com/user-attachments/files/29399050/reproduce.sh)","published":"2026-08-19T17:39:23.125Z","modified":"2026-09-11T03:30:24.372978792Z","cvss":null,"epss":{"score":0.00664,"percentile":0.50019,"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/2026/72xxx/CVE-2026-72717.json"},{"type":"ADVISORY","url":"https://github.com/orval-labs/orval/security/advisories/GHSA-w727-8j6c-2rj4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72717"},{"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":"2026-09-11T03:30:24.372978792Z"}}