CVE-2026-54660: acacode swagger-typescript-api credential exfiltration via remote $ref resolution

CVE-2026-54660 · Severity: high · CVSS 7.4 · Published 2026-07-29

swagger-typescript-api is a tool used by developers to automatically generate code for interacting with web services. A security flaw allows a malicious API specification file to trick the tool into sending the developer's private authentication tokens (such as GitHub or corporate login tokens) to an attacker-controlled server. This could lead to the theft of sensitive credentials used in development or automated build environments.

Technologies: swagger-typescript-api (npm). Vendors: npm.

Quick answers

Is CVE-2026-54660 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-54660 being exploited in the wild.
How severe is CVE-2026-54660?
High severity, with a CVSS score of 7.4, published 29 July 2026.
Which products and versions are affected?
swagger-typescript-api (npm) <= 13.12.1, SEMVER:introduced=0,fixed=13.12.2.
Is there a fix for CVE-2026-54660?
Yes. swagger-typescript-api (npm): upgrade to 13.12.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-54660 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-54660?
Check whether you run swagger-typescript-api (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • swagger-typescript-api (npm): upgrade to 13.12.2 or later
    npm install swagger-typescript-api@13.12.2

Technical details

The vulnerability exists in the remote schema resolution logic within `src/resolved-swagger-schema.ts`. When the `--authorizationToken` flag is used, the `getRemoteRequestHeaders` function attaches the token to every HTTP request made by `fetchRemoteSchemaDocument`. Because `warmUpRemoteSchemasCache` resolves external `$ref` URLs without performing same-origin checks, an attacker can craft an OpenAPI specification that includes a reference to an external, attacker-controlled domain. When a developer or CI/CD pipeline processes this malicious spec, the bearer token is exfiltrated to the attacker's server. This issue is fixed in version 13.12.2 by enforcing same-origin checks for token forwarding.

Affected products

  • acacode swagger-typescript-api < 13.12.2

Identifiers

  • CVE-2026-54660
  • GHSA-h754-fxp7-88wx

Timeline

  • 2026-06-08: patched: Fixed in version 13.12.2
  • 2026-07-29: disclosed: CVE-2026-54660 published

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.