Advisoriesby IbisOpenBaoGHSA-f7c3-mhj2-9pvg
OpenBao TOTP Secrets Engine Code Reuse
Fix: upgrade to 0.0.0-20250806193153-183891f8d535 or later (2 fixed versions below)
Impact
OpenBao's TOTP secrets engine could accept valid codes multiple times rather than strictly-once. This was caused by unexpected normalization in the underlying TOTP library.
Patches
OpenBao v2.3.2 will patch this issue.
In patching, codes which were not normalized (strictly N numeric digits) will now be rejected. This is a potentially breaking change.
Workarounds
TOTP code verification is a privileged action; only trusted systems should be verifying codes. Ensure that all codes are first normalized before submitting to the OpenBao endpoint.
References
This issue was disclosed to HashiCorp and is the OpenBao equivalent of the following tickets:
- https://discuss.hashicorp.com/t/hcsec-2025-17-vault-totp-secrets-engine-code-reuse/76036
- https://nvd.nist.gov/vuln/detail/CVE-2025-6014
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| github.com/openbao/openbao Go | >= 0.1.0, < 2.3.2 | 2.3.2 |
| < 0.0.0-20250806193153-183891f8d535 | 0.0.0-20250806193153-183891f8d535 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-156
- Also known as
- BIT-openbao-2025-55000, CVE-2025-55000, GO-2025-3853
- github.com/openbao/openbao/security/advisories/GHSA-f7c3-mhj2-9pvg
- nvd.nist.gov/vuln/detail/CVE-2025-55000
- nvd.nist.gov/vuln/detail/CVE-2025-6014
- github.com/openbao/openbao/commit/183891f8d535d5b6eb3d79fda8200cade6de99e1
- discuss.hashicorp.com/t/hcsec-2025-17-vault-totp-secrets-engine-code-reuse/76036
- github.com/openbao/openbao
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