CVE-2026-55100: Kyndryl-Open-Source Hashi-Vault-Js

High severity, CVSS 8.7. EPSS: 0.6% chance of exploitation in the next 30 days.

hashi-vault-js is a Node.js module for interacting with the HashiCorp Vault API. Prior to 0.5.2, src/Vault.js concatenates unencoded identifier values including name, username, group, role, and version into Vault request paths and query strings instead of using encodeURIComponent() and URLSearchParams, allowing path traversal and query parameter injection. This issue is fixed in version 0.5.2.

Affected products

• Kyndryl-Open-Source Hashi-Vault-Js: before 0.5.2 (fixed in 0.5.2)

Published 2026-07-31. Last modified 2026-09-10.