{"id":"CVE-2026-71871","title":"Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications","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 a header parameter default is emitted into a module-level template literal emit…","severity":"critical","cwe":["CWE-94","CWE-116","CWE-1336"],"vendor":"orval","product":"orval","affected":["orval < 8.21.0"],"patched":["orval 8.21.0"],"published":"2026-08-19","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:20:38.860","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-71871","references":[{"url":"https://github.com/orval-labs/orval/commit/8ef1bfdf3f9bcaf9dabfbe2e42887f1c0e159ab6","label":"security-advisories@github.com"},{"url":"https://github.com/orval-labs/orval/pull/3692","label":"security-advisories@github.com"},{"url":"https://github.com/orval-labs/orval/releases/tag/v8.21.0","label":"security-advisories@github.com"},{"url":"https://github.com/orval-labs/orval/security/advisories/GHSA-8j6p-r8jg-mxqh","label":"security-advisories@github.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71871"},{"url":"https://github.com/advisories/GHSA-8j6p-r8jg-mxqh"}],"tags":["nvd","ghsa","npm"],"epss":0.00478,"epssPercentile":0.40335,"aliases":["GHSA-8j6p-r8jg-mxqh"],"ecosystem":"npm","ingestedAt":"2026-09-03T19:07:26.123Z","slug":"CVE-2026-71871","body":"## Overview\n\nOrval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. Prior to 8.21.0, a ${...} expression or backtick in a header parameter 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-71871)\n\nAffected packages:\n\n- `orval < 8.21.0`\n\nPatched in:\n\n- `orval 8.21.0`\n\nSource: https://github.com/advisories/GHSA-8j6p-r8jg-mxqh","depth":"midnight","depthScore":52,"depthScoreParts":{"impact":52.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}