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CVE-2026-40946— Oxia: OIDC token audience validation bypass via SkipClientIDCheck

Quick assessment

Affected
oxia-db oxia
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

oxia是Oxia开源的一个分布式元数据存储与协调系统。 Oxia 0.16.2之前版本存在授权问题漏洞，该漏洞源于OIDC身份验证提供程序无条件地在go-oidc验证器配置中设置SkipClientIDCheck: true，禁用了库级别的标准受众声明验证，可能导致同一OIDC颁发者为无关服务颁发的令牌被Oxia接受。

AI Predicted 9.1 Difficulty: Trivial EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1199 · Trusted Relationship
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I. Basic Information for CVE-2026-40946

Vulnerability Information
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Vulnerability Title
Oxia: OIDC token audience validation bypass via SkipClientIDCheck
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
oxia 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
oxia是Oxia开源的一个分布式元数据存储与协调系统。 Oxia 0.16.2之前版本存在授权问题漏洞，该漏洞源于OIDC身份验证提供程序无条件地在go-oidc验证器配置中设置SkipClientIDCheck: true，禁用了库级别的标准受众声明验证，可能导致同一OIDC颁发者为无关服务颁发的令牌被Oxia接受。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
oxia-db oxia < 0.16.2 -

II. Public POCs for CVE-2026-40946

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III. Intelligence Information for CVE-2026-40946

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Same Patch Batch · oxia-db · 2026-04-21 · 4 CVEs total

CVE-2026-40943 Oxia: Server crash via race condition in session heartbeat handling
CVE-2026-40945 Oxia: Bearer token exposed in debug log messages on authentication failure
CVE-2026-40944 Oxia: TLS CA certificate chain validation fails with multi-certificate PEM bundles

IV. Related Vulnerabilities

Same product: oxia
Same vendor: oxia-db
Same weakness: CWE-287

V. Comments for CVE-2026-40946

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