CVE-2026-126310

EUVD-2026-125210
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
8.7 HIGH
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 43.21%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
openbaoopenbao
𝑥
< 2.6.5
CNA
openbaoopenbao
2.7.0 ≤
𝑥
< 2.7.2
CNA
Common Weakness Enumeration
References
https://github.com/openbao/openbao/security/advisories/GHSA-q824-44ff-f5j5
https://www.vulncheck.com/advisories/openbao-before-2.6.5-and-2.7.2-oidc-provider-authentication-bypass-via-client-credentials