Oxia: OIDC token audience validation bypass via SkipClientIDCheck
Priority MEDIUM 41CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-287.
Summary
Oxia is a metadata store and coordination system. Prior to 0.16.2, the OIDC authentication provider unconditionally sets SkipClientIDCheck: true in the go-oidc verifier configuration, disabling the standard audience (aud) claim validation at the library level. This allows tokens issued for unrelated services by the same OIDC issuer to be accepted by Oxia. This vulnerability is fixed in 0.16.2.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00255 17th percentileScored 2026-11-07
Fix Fixed oxia (oxia-db): 0.16.2github.com/oxia-db/oxia (Go): 0.16.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| oxia-db | oxia | before 0.16.2 | 0.16.2 | Patch available | CNA |
| — | github.com/oxia-db/oxia (Go) | before 0.16.2 | 0.16.2 | Patch available | GHSA-fhvp-9hcj-6m33 |
- oxia Vendoroxia-db Affected before 0.16.2 Fixed in 0.16.2 Patch available CNA
- github.com/oxia-db/oxia (Go) Vendor— Affected before 0.16.2 Fixed in 0.16.2 Patch available GHSA-fhvp-9hcj-6m33
Remediation
- Fix · CNA oxia (oxia-db) Fixed in 0.16.2
- Fix · GHSA-fhvp-9hcj-6m33 github.com/oxia-db/oxia (Go) Fixed in 0.16.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-40946
- 2026-10-03 Alias added: GHSA-fhvp-9hcj-6m33
References
More oxia-db vulnerabilities
- TI-2026-29596 Oxia: Bearer token exposed in debug log messages on authentication failure CVSS 4.0HIGH 8.7
- TI-2026-29594 Oxia: Server crash via race condition in session heartbeat handling CVSS 4.0HIGH 8.7
- TI-2026-29595 Oxia: TLS CA certificate chain validation fails with multi-certificate PEM bundles CVSS 4.0MEDIUM 6.9
Sources
- CVE-2026-40946 · CVE Program
- CVE-2026-40946 · NVD
- FIRST EPSS
- GHSA-fhvp-9hcj-6m33 · GitHub Advisory Database · CC BY 4.0
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