GHSA-rxp7-9q75-vj3pMediumCVSS 5.7
OpenBao Login MFA Bypass of Rate Limiting and TOTP Token Reuse
🔗 CVE IDs covered (1)
📋 Description
Impact
OpenBao's Login Multi-Factor Authentication (MFA) system allows enforcing MFA using Time-based One Time Password (TOTP). Due to normalization applied by the underlying TOTP library, codes were accepted which could contain whitespace; this whitespace could bypass internal rate limiting of the MFA method and allow reuse of existing MFA codes.
Patches
OpenBao v2.3.2 will patch this issue.
Workarounds
Use of rate-limiting quotas can limit an attacker's ability to exploit this: 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:
- https://discuss.hashicorp.com/t/hcsec-2025-19-vault-login-mfa-bypass-of-rate-limiting-and-totp-token-reuse/76038
- https://nvd.nist.gov/vuln/detail/CVE-2025-6015
🎯 Affected products2
- go/github.com/openbao/openbao:>= 0.1.0, < 2.3.2
- go/github.com/openbao/openbao:< 0.0.0-20250807113757-8340a6918f6c
🔗 References (6)
- https://github.com/openbao/openbao/security/advisories/GHSA-rxp7-9q75-vj3p
- https://nvd.nist.gov/vuln/detail/CVE-2025-6015
- https://github.com/openbao/openbao/commit/8340a6918f6c41d8f75b6c3845c376d9dc32ed19
- https://discuss.hashicorp.com/t/hcsec-2025-19-vault-login-mfa-bypass-of-rate-limiting-and-totp-token-reuse/76038
- https://nvd.nist.gov/vuln/detail/CVE-2025-55003
- https://github.com/advisories/GHSA-rxp7-9q75-vj3p