CVE-2025-54999Low· 3.7▾ SunlitOpenBao has a Timing Side-Channel in the Userpass Auth Method
▾ Sunlit zone — Low / medium · no exploitation signal
impact 20.4 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 27.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
0.2%
When using OpenBao's userpass auth method, user enumeration was possible due to timing difference between non-existent users and users with stored credentials. This is independent of whether the supplied credentials were valid for the given user.
OpenBao v2.3.2 will patch this issue.
Users may use another auth method or apply rate limiting quotas to limit the number of requests in a period of time: https://openbao.org/api-docs/system/rate-limit-quotas/
This issue was disclosed to HashiCorp and is the OpenBao equivalent of the following tickets:
Barring further information, this is also assumed to cover and remediate the following additional vulnerability:
If this is not the case as further details emerge, a new CVE will be assigned for remediating that. Otherwise, no further CVE will be sought.
github.com/openbao/openbao >= 0.1.0, < 2.3.2github.com/openbao/openbao < 0.0.0-20250806193356-4d9b5d3d6486Upgrade to a patched release:
github.com/openbao/openbao 2.3.2github.com/openbao/openbao 0.0.0-20250806193356-4d9b5d3d6486Connected by shared product, vendor, weakness, or advisory.
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CVE-2026-46405Medium· 5.3OpenBao is an open source identity-based secrets management system
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