High · published June 20, 2026
Quarkus is a Java framework for building cloud-native applications. Prior to versions 3.37.0, 3.36.3, 3.33.2.1, 3.33.3, 3.27.4.1, 3.27.5, and 3.20.6.2, Quarkus HTTP path-based authorization policies can be bypassed using encoded semicolons (%3B) to smuggle matrix parameters past the security layer, and using encoded slashes (%2F) or backslashes (%5C) to access protected static resources. This is a distinct issue from CVE-2026-39852, which addressed only literal semicolon stripping. Versions 3.37.0, 3.36.3, 3.33.2.1, 3.33.3, 3.27.4.1, 3.27.5, and 3.20.6.2 contain a patch.
| Product | Versions | Fixed in |
|---|---|---|
| quarkus/quarkus | < 3.20.6.2 | 3.20.6.2 |
| quarkus/quarkus | ≥ 3.21.0, < 3.27.4.1 | 3.27.4.1 |
| quarkus/quarkus | ≥ 3.28.0, < 3.33.2.1 | 3.33.2.1 |
| quarkus/quarkus | ≥ 3.34.0, < 3.36.3 | 3.36.3 |