CVE-2026-54660 acacode CVE debrief

Who should care

Developers and security teams using swagger-typescript-api should assess their exposure and verify their inventory of affected systems. This vulnerability requires attention from roles responsible for maintaining and securing API clients generated by swagger-typescript-api.

Why it matters

CVE-2026-54660 is a high-severity vulnerability in swagger-typescript-api that allows token exfiltration. Defenders should care because it affects API clients generated by the library, potentially exposing bearer tokens. The issue is fixed in version 13.12.2, and verification of exposure and remediation is necessary.

• Potential token exfiltration to cross-origin endpoints
• Verification of inventory and exposure of affected systems
• Remediation priority for updating to version 13.12.2 or later

Technical summary

The swagger-typescript-api library generates API clients for Fetch or Axios from OpenAPI specifications. Prior to version 13.12.2, the library is vulnerable to token exfiltration due to the forwarding of the --authorizationToken to every URL fetched by fetchRemoteSchemaDocument. This issue allows an attacker-controlled OpenAPI spec to exfiltrate the developer or CI bearer token to a cross-origin endpoint.

Defensive priority

High

Recommended defensive actions

• Review and update swagger-typescript-api to version 13.12.2 or later
• Assess exposure and verify inventory of affected systems
• Monitor for potential token exfiltration attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide details on the swagger-typescript-api vulnerability. The issue is fixed in version 13.12.2. However, the corpus does not establish versions, exploitation, impact, or remediation beyond the provided information.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.