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CVE-2026-40944— Oxia: TLS CA certificate chain validation fails with multi-certificate PEM bundles

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之前版本存在信任管理问题漏洞，该漏洞源于TLS配置中的trustedCertPool函数仅解析CA证书文件中的第一个PEM块，当CA捆绑包包含多个证书时，可能导致mTLS的证书链验证静默失效。

AI Predicted 5.3 Difficulty: Hard EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-40944

Vulnerability Information
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Vulnerability Title
Oxia: TLS CA certificate chain validation fails with multi-certificate PEM bundles
Source: CVE Program / CVE List V5
Vulnerability Description
Oxia is a metadata store and coordination system. Prior to 0.16.2, the trustedCertPool() function in the TLS configuration only parses the first PEM block from CA certificate files. When a CA bundle contains multiple certificates (e.g., intermediate + root CA), only the first certificate is loaded. This silently breaks certificate chain validation for mTLS. This vulnerability is fixed in 0.16.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
oxia 信任管理问题漏洞
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之前版本存在信任管理问题漏洞，该漏洞源于TLS配置中的trustedCertPool函数仅解析CA证书文件中的第一个PEM块，当CA捆绑包包含多个证书时，可能导致mTLS的证书链验证静默失效。
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-2026-40944

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III. Intelligence Information for CVE-2026-40944

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

IV. Related Vulnerabilities

Same product: oxia
Same vendor: oxia-db
Same weakness: CWE-295

V. Comments for CVE-2026-40944

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