---
id: CVE-2025-55000
aliases:
  - GHSA-f7c3-mhj2-9pvg
  - BIT-openbao-2025-55000
  - GO-2025-3853
title: OpenBao TOTP Secrets Engine Code Reuse
summary: OpenBao TOTP Secrets Engine Code Reuse
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
vendor: openbao
product: github.com/openbao/openbao
ecosystem: go
affected:
  - 'github.com/openbao/openbao >= 0.1.0, < 2.3.2'
  - github.com/openbao/openbao < 0.0.0-20250806193153-183891f8d535
patched:
  - github.com/openbao/openbao 2.3.2
  - github.com/openbao/openbao 0.0.0-20250806193153-183891f8d535
published: '2025-08-08'
updated: '2026-07-27'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-f7c3-mhj2-9pvg'
references:
  - url: 'https://github.com/openbao/openbao/security/advisories/GHSA-f7c3-mhj2-9pvg'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-55000'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-6014'
  - url: >-
      https://github.com/openbao/openbao/commit/183891f8d535d5b6eb3d79fda8200cade6de99e1
  - url: >-
      https://discuss.hashicorp.com/t/hcsec-2025-17-vault-totp-secrets-engine-code-reuse/76036
  - url: 'https://github.com/openbao/openbao'
tags:
  - osv
  - go
epss: 0.00214
epssPercentile: 0.10463
ingestedAt: '2026-07-27T19:08:54.670Z'
---

## Overview

### 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 packages

- `github.com/openbao/openbao >= 0.1.0, < 2.3.2`
- `github.com/openbao/openbao < 0.0.0-20250806193153-183891f8d535`

## Remediation

Upgrade to a patched release:

- `github.com/openbao/openbao 2.3.2`
- `github.com/openbao/openbao 0.0.0-20250806193153-183891f8d535`