CVE-2026-39852
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.
Leer descripción completaMostrar menos
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.
CVSS
- Versión: 4.0
- 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Puntuación base: 8.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.63%
- Percentil entre todas las CVEs puntuadas: 49
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access95 % - Impacto principal
T1078Valid Accountsstealth · persistence · privilege escalation · initial access90 %
Acceso remoto sin autenticación (AV:N, PR:N, UI:N) a aplicación web expuesta. Bypassing de políticas de autorización HTTP permite acceso a endpoints protegidos con privilegios no autorizados.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-863
- CWE-551
Referencias
- https://github.com/quarkusio/quarkus/security/advisories/GHSA-rc95-pcm8-65v9
- https://access.redhat.com/errata/RHSA-2026:11720
- https://access.redhat.com/errata/RHSA-2026:11721
- https://access.redhat.com/errata/RHSA-2026:13631
- https://access.redhat.com/errata/RHSA-2026:17789
- https://access.redhat.com/errata/RHSA-2026:25089
- https://access.redhat.com/errata/RHSA-2026:34608
- https://access.redhat.com/errata/RHSA-2026:54435
- https://access.redhat.com/security/cve/CVE-2026-39852
- https://bugzilla.redhat.com/show_bug.cgi?id=2457819
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39852.json
JSON original (NVD)
Mostrar
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"value": "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."
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"value": "Quarkus es un framework Java para construir aplicaciones nativas de la nube. En versiones anteriores a 3.20.6.1, 3.27.3.1, 3.33.1.1, 3.35.1.1, 3.34.7 y 3.35.2, una inconsistencia en la normalización de rutas entre la capa de seguridad y la capa de enrutamiento permite a usuarios no autenticados o con privilegios inferiores eludir las políticas de autorización basadas en rutas HTTP. La capa de seguridad de Quarkus realiza comprobaciones de autorización en la ruta URL sin procesar, que conserva los parámetros de matriz (punto y coma), mientras que la capa de enrutamiento de RESTEasy Reactive elimina los parámetros de matriz antes de hacer coincidir los puntos finales. Un atacante puede añadir un punto y coma y texto arbitrario a una URL de solicitud (por ejemplo, /api/admin;anything) para eludir las políticas que protegen /api/admin mientras sigue enrutando al punto final protegido. Este problema ha sido solucionado en las versiones 3.20.6.1, 3.27.3.1, 3.33.1.1, 3.35.1.1, 3.34.7 y 3.35.2."
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"lastModified": "2026-08-17T12:18:23.367",
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