Critical
Orval: Import-time RCE via array-items default -> zod module-level template literal
Type: advisorySources: OSV
Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. Prior to 8.21.0, a ${...} expression or backtick in an array item default is emitted into a module-level template literal emitted by zod schema generation without safe encoding. This permits attacker-controlled JavaScript to be evaluated when the generated zod schema module is imported, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/zod/src/index.ts function formatDefaultValue. This issue is fixed in version 8.21.0.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-71869
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 04:30 UTC · Revision 1
Source evidence
Orval: Import-time RCE via array-items default -> zod module-level template literal
core-osv · Original sourcePublished 19 Aug 2026, 17:36 UTC
Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. Prior to 8.21.0, a ${...} expression or backtick in an array item default is emitted into a module-level template literal emitted by zod schema generation without safe encoding. This permits attacker-controlled JavaScript to be evaluated when the generated zod schema module is imported, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/zod/src/index.ts function formatDefaultValue. This issue is fixed in version 8.21.0.
osv:CVE-2026-71869
Complete source record
{
"id": "a82b63a2efbfeee7f672e275be7372da0ff0b15d08c08f98ab781a1530113362",
"url": "https://osv.dev/vulnerability/CVE-2026-71869",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Orval: Import-time RCE via array-items default -> zod module-level template literal",
"summary": "Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. Prior to 8.21.0, a ${...} expression or backtick in an array item default is emitted into a module-level template literal emitted by zod schema generation without safe encoding. This permits attacker-controlled JavaScript to be evaluated when the generated zod schema module is imported, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/zod/src/index.ts function formatDefaultValue. This issue is fixed in version 8.21.0.",
"evidence": "osv:CVE-2026-71869",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-71869",
"aliases": [
"CVE-2026-71869",
"GHSA-2h9g-j24r-h63g"
],
"metrics": [
{
"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"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/orval-labs/orval",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "1d1a1d07b8faf1615bfd4b06c7783a3a51c038df"
},
{
"fixed": "8ef1bfdf3f9bcaf9dabfbe2e42887f1c0e159ab6"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "8.21.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "8ef1bfdf3f9bcaf9dabfbe2e42887f1c0e159ab6"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "1d1a1d07b8faf1615bfd4b06c7783a3a51c038df"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v8.21.0"
}
]
}
}
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71869.json"
}
}
],
"modified": "2026-10-28T02:30:25.667775801Z",
"provider": "osv",
"references": [
"https://github.com/orval-labs/orval/releases/tag/v8.21.0",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71869.json",
"https://github.com/orval-labs/orval/security/advisories/GHSA-2h9g-j24r-h63g",
"https://nvd.nist.gov/vuln/detail/CVE-2026-71869",
"https://github.com/orval-labs/orval/commit/8ef1bfdf3f9bcaf9dabfbe2e42887f1c0e159ab6",
"https://github.com/orval-labs/orval/pull/3692"
],
"provider_metadata": {
"cwe_ids": [
"CWE-116",
"CWE-1336",
"CWE-94"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71869.json"
}
},
"related_cves": [
{
"value": "CVE-2026-71869",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 492467,
"published_at": "2026-08-19T17:36:06.8+00:00"
}