CVE-2026-39852
Published:May 05, 2026
Updated:May 16, 2026
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
io.quarkus:quarkus-vertx-http (JAVA):
Affected version(s) >=0.23.0 <3.20.6.1Fix Suggestion:
Update to version 3.20.6.1io.quarkus:quarkus-vertx-http (JAVA):
Affected version(s) >=3.33.0 <3.33.1.1Fix Suggestion:
Update to version 3.33.1.1io.quarkus:quarkus-vertx-http (JAVA):
Affected version(s) >=3.27.0 <3.27.3.1Fix Suggestion:
Update to version 3.27.3.1io.quarkus:quarkus-vertx-http (JAVA):
Affected version(s) >=3.34.0 <3.34.7Fix Suggestion:
Update to version 3.34.7io.quarkus:quarkus-vertx-http (JAVA):
Affected version(s) >=3.35.0 <3.35.1.1Fix Suggestion:
Update to version 3.35.1.1Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
EPSS
Base Score:
0.04