Description
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.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| quarkusio | quarkus | >= 3.36.0, < 3.36.3; >= 3.33.0, < 3.33.2.1; >= 3.27.0, < 3.27.4.1; < 3.20.6.2 |
| Red Hat | Cryostat 4 on RHEL 9 | — |
| Red Hat | Cryostat 4 on RHEL 9 | — |
| Red Hat | Cryostat 4 on RHEL 9 | — |
| Red Hat | Red Hat Build of Apache Camel 3.33 for Quarkus 3.33.2.SP1 | — |
| Red Hat | Red Hat build of Quarkus 3.20.6.SP2 | — |
| Red Hat | Red Hat build of Quarkus 3.27.4.SP1 | — |
| Red Hat | Red Hat build of Quarkus 3.33.2.SP1 | — |
| Red Hat | Streams for Apache Kafka 2.9.4 | — |
| Red Hat | Red Hat OpenShift Dev Spaces 3.29 | — |
| Red Hat | OpenShift Serverless | — |
| Red Hat | OpenShift Serverless | — |
| Red Hat | OpenShift Serverless | — |
| Red Hat | OpenShift Serverless | — |
| Red Hat | OpenShift Serverless | — |
| Red Hat | OpenShift Serverless | — |
| Red Hat | OpenShift Serverless | — |
| Red Hat | OpenShift Serverless | — |
| Red Hat | Red Hat build of Apache Camel 4 for Quarkus 3 | — |
| Red Hat | Red Hat build of Apache Camel - HawtIO 4 | — |
| Red Hat | Red Hat build of Apicurio Registry 3 | — |
| Red Hat | Red Hat build of Debezium 3 | — |
| Red Hat | Red Hat Build of Keycloak | — |
| Red Hat | Red Hat Build of Keycloak | — |
| Red Hat | Red Hat Build of Keycloak | — |
| Red Hat | Red Hat Build of Keycloak | — |
| Red Hat | Red Hat Build of Keycloak | — |
| Red Hat | Red Hat Fuse 7 | — |
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | — |
| Red Hat | Red Hat OpenShift AI (RHOAI) | — |
| Red Hat | streams for Apache Kafka 3 | — |
References
- https://github.com/quarkusio/quarkus/security/advisories/GHSA-qcxp-gm7m-4j5vExploit, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:26017
- https://access.redhat.com/errata/RHSA-2026:26018
- https://access.redhat.com/errata/RHSA-2026:26194
- https://access.redhat.com/errata/RHSA-2026:26586
- https://access.redhat.com/errata/RHSA-2026:34608
- https://access.redhat.com/errata/RHSA-2026:36820
- https://access.redhat.com/errata/RHSA-2026:48151
- https://access.redhat.com/errata/RHSA-2026:54435
- https://access.redhat.com/security/cve/CVE-2026-50559
- https://bugzilla.redhat.com/show_bug.cgi?id=2486959
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50559.json
Timeline
- Published
- Jun 19, 2026
- Last modified
- Oct 25, 2026
- NVD status
- Modified