CVE-2026-54666 acacode CVE debrief

Who should care

Defenders responsible for maintaining or securing applications using swagger-typescript-api should assess exposure and prioritize verification and remediation efforts. This includes operators, platform administrators, vulnerability management teams, and security teams who need to review OpenAPI Specification paths and ensure that they are not vulnerable to ${...} interpolation attacks.

Why it matters

CVE-2026-54666 allows potential code execution via attacker-controlled paths in swagger-typescript-api. Defenders should verify and upgrade to version 13.12.2 or later, review OpenAPI Specification paths, and monitor for potential exploitation attempts.

• Potential code execution via attacker-controlled paths
• Verification of OpenAPI Specification paths required to prevent exploitation
• Upgrade to version 13.12.2 or later necessary to fix vulnerability

Technical summary

The swagger-typescript-api library generates API clients for Fetch or Axios from an OpenAPI Specification. Prior to version 13.12.2, the library passes OpenAPI path keys through parseRouteName to templates/default/procedure-call.ejs and templates/modular/procedure-call.ejs without escaping JavaScript template literal interpolation. This allows an attacker-controlled path containing ${...} to execute when the generated method is called.

Defensive priority

Defenders should prioritize verifying and upgrading to version 13.12.2 or later of swagger-typescript-api to prevent potential code execution.

Recommended defensive actions

• Verify and upgrade to version 13.12.2 or later of swagger-typescript-api
• Review and update OpenAPI Specification paths to prevent ${...} interpolation
• Monitor for potential exploitation 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 vulnerability in swagger-typescript-api, which allows an attacker-controlled path to execute when the generated method is called. Evidence is based on official CVE and NVD records, as well as source references from GitHub.

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.