Description
swagger-typescript-api generates API clients for Fetch or Axios from OpenAPI specifications. Prior to 13.12.2, src/code-gen-process.ts createApiConfig copies servers[0].url into apiConfig.baseUrl, and templates/base/http-clients/fetch-http-client.ejs interpolates apiConfig.baseUrl into the generated HttpClient baseUrl field without escaping, allowing an attacker-controlled OpenAPI spec to inject TypeScript static field code that executes when the generated fetch client module is imported. This issue is fixed in version 13.12.2.
References5
- github.com/acacode/swagger-typescript-api/commit/306d59acb8ffbb…
- github.com/acacode/swagger-typescript-api/pull/1779
- github.com/acacode/swagger-typescript-api/releases/tag/v13.12.2
- github.com/acacode/swagger-typescript-api/security/advisories/G…
- github.com/acacode/swagger-typescript-api/security/advisories/G…
Metrics
- CVSS 3.1
-
8.3
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 29 · as of 13 November 2026
- CWE
- CWE-74CWE-94CWE-1336
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.