Lack of protection against brute force attacks In github.com/openbao/openbao
Description
OpenBao Userpass and LDAP User Lockout Bypass
Impact
Attackers could bypass the automatic user lockout mechanisms in the OpenBao Userpass or LDAP auth systems. This was caused by different aliasing between pre-flight and full login request user entity alias attributions.
Patches
OpenBao v2.3.2 will patch this issue.
Workarounds
Existing users may apply rate-limiting quotas on the authentication endpoints: https://openbao.org/api-docs/system/rate-limit-quotas/
References
This issue was disclosed to HashiCorp and is the OpenBao equivalent of the following tickets:
Mitigation
Update Impact
Minimal update. May introduce new vulnerabilities or breaking changes.
Ecosystem | Package | Affected version | Patched versions |
|---|---|---|---|
 go | 2.3.2, 0.0.0-20250807212521-c52795c1ef74 |
Aliases
References