CVE-2026-126310
OpenBao before 2.6.5 and 2.7.2 OIDC Provider Authentication Bypass via Client Credentials
CVSS Score
8.7
EPSS Score
0.0%
EPSS Percentile
0th
OpenBao before 2.6.5 and 2.7.2 contains an authentication bypass vulnerability that allows unauthenticated callers to obtain OIDC ID tokens by abusing public clients with client_credentials enabled. Attackers who know a public client's client_id can request tokens from the identity/oidc/provider/<name>/token endpoint to impersonate the client without any secret.
| CWE | CWE-287 |
| Vendor | openbao |
| Product | openbao |
| Published | Nov 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
openbao / openbao
0 < 2.6.5 2.7.0 < 2.7.2
References
Credits
🔍 datosh cipherboy