kyndryl-open-source hashi-vault-js up to 0.5.1 Request Path Construction src/Vault.js encodeURIComponent name/username/group/role/version path traversal

Summaryinfo

A vulnerability described as critical has been identified in kyndryl-open-source hashi-vault-js up to 0.5.1. Affected by this vulnerability is the function encodeURIComponent of the file src/Vault.js of the component Request Path Construction. The manipulation of the argument name/username/group/role/version results in path traversal. This vulnerability is known as CVE-2026-55100. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as critical has been found in kyndryl-open-source hashi-vault-js up to 0.5.1. Affected is the function encodeURIComponent of the file src/Vault.js of the component Request Path Construction. The manipulation of the argument name/username/group/role/version with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-55100 since 06/16/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 0.5.2 eliminates this vulnerability.

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Productinfo

Vendor

• kyndryl-open-source

Name

• hashi-vault-js

Version

• 0.5.0
• 0.5.1

License

• open-source

Website

• Product: https://github.com/kyndryl-open-source/hashi-vault-js/

CPE 2.3info

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CPE 2.2info

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