CVE-2026-126310
OpenBao before 2.6.5 and 2.7.2 OIDC Provider Authentication Bypass via Client Credentials
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| openbao openbao github.com/openbao/openbao/v2
golang |
≥ 0; < 2.6.5 (affected, semver) 2.6.5 (unaffected, semver) ≥ 2.7.0; < 2.7.2 (affected, semver) 2.7.2 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.0 high |
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:N | CNA: VulnCheck |
| 3.1 / 8.7 high |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/openbao/openbao/security/advisories/GHSA-q824-44ff-f5j5CNA: VulnCheck · vendor-advisory
- https://www.vulncheck.com/advisories/openbao-before-2.6.5-and-2.7.2-oidc-provider-authentication-bypass-via-client-credentialsCNA: VulnCheck · third-party-advisory
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