CVE-2026-55100 json
hashi-vault-js has a path traversal and query parameter injection
published 3mo ago modified 19d ago also GHSA-g956-2f74-rmv7 , EUVD-2026-51575
- cvss
- 8.7
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm hashi-vault-js 0.5.2
Is CVE-2026-55100 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 3mo ago
Exploit prediction
0.56% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | 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 |
| CNA | 4.0 | 8.7 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | hashi-vault-js | <0.5.2 |
0.5.2 |
Affected products
- kyndryl-open-source hashi-vault-js
Classification
References
-
github.com
/kyndryl-open-source/hashi-vault-js/pull/66
web
-
github.com
/kyndryl-open-source/hashi-vault-js/commit/ea2f76052d366a08f35f62ef4c12b6a334c91ec2
web
-
github.com
/kyndryl-open-source/hashi-vault-js/security/advisories/GHSA-g956-2f74-rmv7
web
-
github.com
/kyndryl-open-source/hashi-vault-js/releases/tag/v0.5.2
web
-
github.com
/kyndryl-open-source/hashi-vault-js
package
Sources
- CVE List CVE-2026-55100
- GitHub Advisory GHSA-g956-2f74-rmv7
- NVD CVE-2026-55100
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.