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Vulnerability · Published May 5, 2026 · Assigned by GitHub_M

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

High 8.2

In plain English

A high-severity incorrect authorization in quarkus from quarkusio. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.7%top 46.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Mavenio.quarkus:quarkus-vertx-http3.20.6.1GHSA-rc95-pcm8-65v9
Mavenio.quarkus:quarkus-vertx-http3.27.3.1GHSA-rc95-pcm8-65v9
Mavenio.quarkus:quarkus-vertx-http3.33.1.1GHSA-rc95-pcm8-65v9
Mavenio.quarkus:quarkus-vertx-http3.35.1.1GHSA-rc95-pcm8-65v9

Affected products (as reported)

VendorProductVersions
quarkusio quarkus < 3.20.6.1>= 3.27.3.0, < 3.27.3.1>= 3.34.0, < 3.34.7>= 3.35.0, < 3.35.2

Weakness: CWE-863, CWE-551 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

References