{"id":"GHSA-fg9p-mrxr-hvq7","summary":"Orval: RCE via OpenAPI path -\u003e unescaped request-URL template literal (backtick breakout)","details":"### Summary\n\nOrval emits the OpenAPI path into the generated request URL as a TEMPLATE LITERAL (`` `/users/...` ``) without escaping the backtick character. A path containing a backtick closes the template literal and injects a concatenation expression that is evaluated when the generated URL/request/key function is called, executing attacker-controlled code. Affects the axios, fetch, react-query, and swr clients. Verified on Orval 8.19.0; survives Orval's default OpenAPI validation.\n\n### Details\n\n```ts\n// generated URL builder (fetch client)\nreturn `/users/` + (globalThis.X = require(\"fs\").writeFileSync(\"/marker\",\"pwned\")) + `/list`;\n```\n\nThe backtick in the path terminates the `` `...` `` literal; `+ (\u003ccode\u003e) +` runs as a live expression; a trailing backtick reopens a template literal so the file stays valid. The code runs whenever the generated request function, URL builder, or query-key function is called.\n\nThis is distinct from Orval's four published CVEs: CVE-2026-22785 (`summary` -\u003e MCP server), CVE-2026-23947 / CVE-2026-25141 (`x-enumDescriptions`), and CVE-2026-24132 (`const` -\u003e mock files). This is a different field (the route path) and a different sink (the request-URL template literal), which those advisories and their fixes do not cover.\n\n### PoC\n\n`reproduce.sh` (+ `make_spec.py`) attached: generates a fetch client with default validation, bundles it, calls the generated functions, and shows a marker file written. Verified on 8.19.0.\n\n### Impact\n\nCode execution in any environment that calls a client generated from an attacker-controlled or attacker-influenced OpenAPI description (developer, CI, or the running application). \n\n### Suggested fix\n\nEscape the path before emitting it into the URL template literal (escape backtick and `${`, or build the URL with an encoder that treats the path as data), and validate path characters.","aliases":["CVE-2026-62681"],"modified":"2026-09-18T05:30:05.805575330Z","published":"2026-09-03T19:17:32Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-09-03T19:17:32Z","nvd_published_at":"2026-08-19T18:16:54Z","cwe_ids":["CWE-116","CWE-1336","CWE-94"],"severity":"CRITICAL"},"references":[{"type":"WEB","url":"https://github.com/orval-labs/orval/security/advisories/GHSA-fg9p-mrxr-hvq7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62681"},{"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-fg9p-mrxr-hvq7/GHSA-fg9p-mrxr-hvq7.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"}]}