Vulnerability · Published Jul 31, 2026 · Assigned by GitHub_M

CVE-2026-55100hashi-vault-js has a path traversal and query parameter injection

High 8.7

In plain English

A high-severity injection in hashi-vault-js from kyndryl-open-source. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.6%top 53.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	hashi-vault-js	0.5.2	GHSA-g956-2f74-rmv7

Affected products (as reported)

Vendor	Product	Versions
kyndryl-open-source	hashi-vault-js	< 0.5.2

Weakness: CWE-23, CWE-74 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

References

https://github.com/kyndryl-open-source/hashi-vault-js/security/advisories/GHSA-g956-2f74-rmv7 x_refsource_CONFIRM
https://github.com/kyndryl-open-source/hashi-vault-js/pull/66 x_refsource_MISC
https://github.com/kyndryl-open-source/hashi-vault-js/commit/ea2f76052d366a08f35f62ef4c12b6a334c91ec2 x_refsource_MISC
https://github.com/kyndryl-open-source/hashi-vault-js/releases/tag/v0.5.2 x_refsource_MISC