Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-31838— Istio HTTP debug endpoints on port 15014 to enforce namespace-based authorization, preventing cross-namespace proxy data access.

Quick assessment

Affected
istio istio
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.

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之前版本存在安全漏洞，该漏洞源于Envoy RBAC标头匹配存在缺陷，可能导致授权策略绕过。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.22% · P13
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-31838

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Istio HTTP debug endpoints on port 15014 to enforce namespace-based authorization, preventing cross-namespace proxy data access.
Source: CVE Program / CVE List V5
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 vulnerability in Envoy RBAC header matching could allow authorization policy bypass when policies rely on HTTP headers that may contain multiple values. An attacker could craft requests with multiple header values in a way that causes Envoy to evaluate the header differently than intended, potentially bypassing authorization checks. This may allow unauthorized requests to reach protected services when policies depend on such header-based matching conditions. This vulnerability is fixed in 1.29.1, 1.28.5, and 1.27.8.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Istio 安全漏洞
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之前版本存在安全漏洞，该漏洞源于Envoy RBAC标头匹配存在缺陷，可能导致授权策略绕过。
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
istio istio >= 1.29.0-alpha.0, < 1.29.1 -

II. Public POCs for CVE-2026-31838

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-31838

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-31838 (1)

Vendor Advisories for CVE-2026-31838 (1)

IV. Related Vulnerabilities

Same product: istio
Same vendor: istio
Same weakness: CWE-863