Vulnerability · Published Jul 29, 2026 · Assigned by GitHub_M

CVE-2026-54662swagger-typescript-api vulnerable to code injection via unescaped `servers[0].url` in fetch http-client template

High 8.3

In plain English

A high-severity injection in swagger-typescript-api from acacode. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.3High

Exploit odds (30 days)0.3%top 71.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	swagger-typescript-api	13.12.2	GHSA-hqj5-cw9f-rx67

Affected products (as reported)

Vendor	Product	Versions
acacode	swagger-typescript-api	< 13.12.2

Weakness: CWE-74, CWE-94, CWE-1336 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

References

https://github.com/acacode/swagger-typescript-api/security/advisories/GHSA-hqj5-cw9f-rx67 x_refsource_CONFIRM
https://github.com/acacode/swagger-typescript-api/pull/1779 x_refsource_MISC
https://github.com/acacode/swagger-typescript-api/commit/306d59acb8ffbb00f953f807b97234b21f51d9de x_refsource_MISC
https://github.com/acacode/swagger-typescript-api/releases/tag/v13.12.2 x_refsource_MISC