CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:HCVE-2026-128100 Vault vulnerable to ACL deny bypass via case-variant auth method user and group names
Medium (6.5) in hashicorp.
On this page
Vault Community Edition and Vault Enterprise did not apply explicit ACL policy deny rules to letter case variants of user and group names in auth methods that treat these names as case-insensitive. This may allow an authenticated user with delegated permissions to modify a protected user or group, potentially leading to privilege escalation. This vulnerability (CVE-2026-128100) is fixed in Vault Community Edition 2.2.2 and Vault Enterprise 2.2.2, 1.21.14, and 1.19.25.
Severity
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: no · Technical impact: partial, assessed 2026-11-13. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-178 Improper Handling of Case Sensitivity
- Published
- Modified
- Assigned by
- HashiCorp (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Affected
- hashicorp:vault
- hashicorp:vault enterprise
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| HashiCorp Vault | from 0.10.0 before 2.2.2 |
| HashiCorp Vault Enterprise | from 0.10.0 before 2.2.2 |
Fixed in
| Product | Fixed in |
|---|---|
| HashiCorp Vault Enterprise | 1.19.25 |
| HashiCorp Vault Enterprise | 1.21.14 |
Fix and patched versions
- HashiCorp Vault Enterprise: fixed in 1.19.25
- HashiCorp Vault Enterprise: fixed in 1.21.14