Access Control Bypass in Vault Community Edition and Enterprise by HashiCorp
CVE-2026-128100

6.5MEDIUM

Key Information:

Vendor

Hashicorp
Status
Vault
Vault Enterprise
Vendor
CVE Published:
13 November 2026

What is CVE-2026-128100?

The Vault Community Edition and Vault Enterprise by HashiCorp are susceptible to access control list (ACL) policy bypass due to case sensitivity issues in user and group names. The vulnerability arises when certain authentication methods treat user and group names as case-insensitive, allowing an authenticated user with delegated permissions to manipulate a protected user or group. This oversight may lead to unauthorized privilege escalation, posing risks to system security. Users are advised to upgrade to the latest versions to mitigate the exposure.

Affected Version(s)

Vault 64 bit 0.10.0 < 2.2.2

Vault Enterprise 64 bit 0.10.0 < 2.2.2

References

https://discuss.hashicorp.com/t/hcsec-2026-58-vault-vulne...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was reported to HashiCorp by Chase Bevan-Thomas.
.