EUVD-2026-62658Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from Vendor (GitHub_M) · only source for this CVE.
CVSS VectorVendor: GitHub_M
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4DescriptionCVE.org
Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. Prior to 8.21.0, an unescaped backtick in servers[0].url is emitted into request URL template literals generated when output.baseUrl.getBaseUrlFromSpecification is enabled without safe encoding. This permits attacker-controlled JavaScript to be evaluated when a generated request or URL-builder function is called, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/core/src/getters/route.ts function getFullRoute. This issue is fixed in version 8.21.0.
AnalysisAI
Arbitrary code execution in Orval before 8.21.0 arises when the code generator emits an unescaped backtick (or ${...}) from a Swagger/OpenAPI spec's servers[0].url directly into the JavaScript template literals of generated request and URL-builder functions. Because the malicious spec content breaks out of the template literal, attacker-controlled JavaScript runs the moment the generated client is built or invoked — poisoning developer machines, CI runners, test harnesses, and downstream applications. …
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Recommended ActionAI
Within 24 hours: Audit all Orval deployments to identify instances running versions before 8.21.0 with output.baseUrl.getBaseUrlFromSpecification enabled; immediately disable this feature in all production and development configurations if patch cannot be immediately applied, and isolate any CI/CD pipelines using affected versions. …
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Same weakness CWE-94 – Code Injection
View allSame technique Code Injection
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External POC / Exploit Code
Leaving vuln.today