Unintended endpoint access via unencoded identifiers
Published Jul 31, 2026 · Updated Jul 31, 2026
Path traversal and query injection in Kyndryl Hashi Vault JS before 0.5.2 allow remote attackers to reach unintended Vault endpoints. Vault.js concatenates unencoded name, username, group, role, and version values into URL paths and query strings, so traversal segments and separators alter the downstream request. Exploitation requires a consuming application to pass attacker-controlled identifiers, and access is bounded by the application's Vault token.
Summary
What happened
Path traversal and query injection in Kyndryl Hashi Vault JS before 0.5.2 allow remote attackers to reach unintended Vault endpoints. Vault.js concatenates unencoded name, username, group, role, and version values into URL paths and query strings, so traversal segments and separators alter the downstream request. Exploitation requires a consuming application to pass attacker-controlled identifiers, and access is bounded by the application's Vault token.
The record
- CVE
- CVE-2026-55100
- Published
- Jul 31, 2026
- Updated
- Jul 31, 2026
- Vendor
- Kyndryl
- Product
- Hashi Vault JS
- Classifications
- CWE-74, CWE-23
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 31, 2026CVE publishedPublication date reported by the CVE source.
- Jul 31, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 0.5.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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