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CVE-2026-39852— Quarkus authorization bypass via semicolon path normalization inconsistency

Quick assessment

Affected
quarkusio quarkus
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.

Quarkus是Quarkus开源的一个用于编写 Java 应用程序的云原生 (Linux) 容器优先框架。 Quarkus存在安全漏洞，该漏洞源于安全层和路由层之间的路径规范化不一致，允许未经身份验证或低权限用户绕过基于HTTP路径的授权策略。以下版本受到影响：3.20.6.1之前版本、3.27.3.1之前版本、3.33.1.1之前版本、3.35.1.1之前版本、3.34.7之前版本和3.35.2之前版本。

CVSS 8.8 · High EPSS 0.44% · P37

Affected Version Matrix 4

VendorProduct Version RangeStatus
quarkusio quarkus < 3.20.6.1 affected
>= 3.27.3.0, < 3.27.3.1 affected
>= 3.34.0, < 3.34.7 affected
>= 3.35.0, < 3.35.2 affected
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I. Basic Information for CVE-2026-39852

Vulnerability Information
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Vulnerability Title
Quarkus authorization bypass via semicolon path normalization inconsistency
Source: CVE Program / CVE List V5
Vulnerability Description
Quarkus is a Java framework for building cloud-native applications. In versions prior to 3.20.6.1, 3.27.3.1, 3.33.1.1, 3.35.1.1, 3.34.7, and 3.35.2, a path normalization inconsistency between the security layer and the routing layer allows unauthenticated or lower-privileged users to bypass HTTP path-based authorization policies. Quarkus's security layer performs authorization checks on the raw URL path which preserves matrix parameters (semicolons), while RESTEasy Reactive's routing layer strips matrix parameters before matching endpoints. An attacker can append a semicolon and arbitrary text to a request URL (e.g., /api/admin;anything) to bypass policies protecting /api/admin while still routing to the protected endpoint. This issue has been fixed in versions 3.20.6.1, 3.27.3.1, 3.33.1.1, 3.35.1.1, 3.34.7, and 3.35.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/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
Quarkus 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Quarkus是Quarkus开源的一个用于编写 Java 应用程序的云原生 (Linux) 容器优先框架。 Quarkus存在安全漏洞，该漏洞源于安全层和路由层之间的路径规范化不一致，允许未经身份验证或低权限用户绕过基于HTTP路径的授权策略。以下版本受到影响：3.20.6.1之前版本、3.27.3.1之前版本、3.33.1.1之前版本、3.35.1.1之前版本、3.34.7之前版本和3.35.2之前版本。
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
quarkusio quarkus < 3.20.6.1 -

II. Public POCs for CVE-2026-39852

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III. Intelligence Information for CVE-2026-39852

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Vendor Advisories for CVE-2026-39852 (1)

IV. Related Vulnerabilities

Same product: quarkus
Same vendor: quarkusio
Same weakness: CWE-863

V. Comments for CVE-2026-39852

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