CVE-2026-39852 PUBLISHED

Quarkus authorization bypass via semicolon path normalization inconsistency

Assigner: GitHub_M
Reserved: 07.04.2026 Published: 05.05.2026 Updated: 05.05.2026

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.

Metrics

CVSS Vector: 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
CVSS Score: 8.8

Product Status

Vendor quarkusio
Product quarkus
Versions
  • Version < 3.20.6.1 is affected
  • Version >= 3.27.3.0, < 3.27.3.1 is affected
  • Version >= 3.34.0, < 3.34.7 is affected
  • Version >= 3.35.0, < 3.35.2 is affected

References

Problem Types

  • CWE-863: Incorrect Authorization CWE