CVE-2026-31837— Istio JWKS resolver to prevent private key material from being exposed when JWKS fetch fails.
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I. Basic Information for CVE-2026-31837
Vulnerability Information
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Vulnerability Title
Istio JWKS resolver to prevent private key material from being exposed when JWKS fetch fails.
Source: NVD (National Vulnerability Database)
Vulnerability Description
Istio is an open platform to connect, manage, and secure microservices. Prior to 1.29.1, 1.28.5, and 1.27.8, a user of Istio is impacted if the JWKS resolver becomes unavailable or the fetch fails, exposing hardcoded defaults regardless of use of the RequestAuthentication resource. This vulnerability is fixed in 1.29.1, 1.28.5, and 1.27.8.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
Istio 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Istio是Istio开源的一套连接、管理和保护微服务的开放平台。 Istio 1.29.1之前版本、1.28.5之前版本和1.27.8之前版本存在信息泄露漏洞，该漏洞源于JWKS解析器不可用或获取失败时暴露硬编码默认值，可能导致安全配置失效。
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
II. Public POCs for CVE-2026-31837
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IV. Related Vulnerabilities
Same product: istio
- CVE-2026-41413
Istio Vulnerable to SSRF via RequestAuthentication jwksUri - CVE-2026-39350
Istio AuthorizationPolicy Incorrect Regex Matching of Dots i - CVE-2026-31838
Istio HTTP debug endpoints on port 15014 to enforce namespac - CVE-2022-39388
Istio may allow identity impersonation if user has localhost - CVE-2022-39278
Istio vulnerable to denial of service attack due to Golang R
Same vendor: istio
- CVE-2026-41413
Istio Vulnerable to SSRF via RequestAuthentication jwksUri - CVE-2026-39350
Istio AuthorizationPolicy Incorrect Regex Matching of Dots i - CVE-2026-31838
Istio HTTP debug endpoints on port 15014 to enforce namespac - CVE-2022-39388
Istio may allow identity impersonation if user has localhost - CVE-2022-39278
Istio vulnerable to denial of service attack due to Golang R
Same weakness: CWE-200
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V. Comments for CVE-2026-31837
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