Vulnerability · Published Jul 29, 2026 · Assigned by GitHub_M

CVE-2026-54663swagger-typescript-api vulnerable to Server-Side Request Forgery via spec `$ref`

Medium 6.1

In plain English

A medium-severity improper input validation 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 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.2%top 87.1% 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/resolved-swagger-schema.ts warmUpRemoteSchemasCache resolves external $ref URLs and fetchRemoteSchemaDocument uses isHttpUrl to fetch any http or https target without private IP, redirect, DNS rebinding, or same-origin validation, allowing an attacker-controlled OpenAPI spec to make the generator issue requests to internal or link-local services. 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-x36r-4347-pm5x

Affected products (as reported)

Vendor	Product	Versions
acacode	swagger-typescript-api	< 13.12.2

Weakness: CWE-20, CWE-441, CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

https://github.com/acacode/swagger-typescript-api/security/advisories/GHSA-x36r-4347-pm5x 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