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...

CVE-2026-39852

Summary of CVE-2026-39852 : Quarkus exposes an authorization bypass due to path normalization mismatch between the security layer and RESTEasy Reactive routing, which preserves semicolons (matrix parameters) in the raw URL while routing drops them for endpoint matching. This allows unauthenticate...

io.quarkus:quarkus-vertx-http: io.quarkus:quarkus-vertx-http: Authorization bypass via semicolons in HTTP requests

A flaw was found in io.quarkus:quarkus-vertx-http. A remote attacker can exploit an authorization bypass vulnerability by including semicolons, also known as matrix parameters, in HTTP requests. This allows bypassing path-based HTTP security policies, enabling unauthorized access to protected...

io.quarkus:quarkus-vertx-http: io.quarkus:quarkus-vertx-http: Authorization bypass via semicolons in HTTP requests

A flaw was found in io.quarkus:quarkus-vertx-http. A remote attacker can exploit an authorization bypass vulnerability by including semicolons, also known as matrix parameters, in HTTP requests. This allows bypassing path-based HTTP security policies, enabling unauthorized access to protected...

io.quarkus:quarkus-vertx-http: io.quarkus:quarkus-vertx-http: Authorization bypass via semicolons in HTTP requests

A flaw was found in io.quarkus:quarkus-vertx-http. A remote attacker can exploit an authorization bypass vulnerability by including semicolons, also known as matrix parameters, in HTTP requests. This allows bypassing path-based HTTP security policies, enabling unauthorized access to protected...

CVE-2026-39852

A flaw was found in io.quarkus:quarkus-vertx-http. A remote attacker can exploit an authorization bypass vulnerability by including semicolons, also known as matrix parameters, in HTTP requests. This allows bypassing path-based HTTP security policies, enabling unauthorized access to protected...

Quarkus has Authentication/Authorization bypasses

Quarkus version 3.32.4 is vulnerable to an authorization bypass issue GHSL-2026-099, in which semicolons matrix parameters in HTTP requests can be used to bypass security constraints, potentially allowing unauthorized access to protected resources. Unauthenticated or lower-privileged users can...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization when handling HTTP request paths that have had normalizedPath applied. An attacker can gain unauthorized access to protected resources by appending a semicolon and arbitrary text to the request URL, exploiting...

Improper Validation of Syntactic Correctness of Input

Overview Affected versions of this package are vulnerable to Improper Validation of Syntactic Correctness of Input due to the improper validation of matrix parameters in URL paths in JAX-RS routing layer. An attacker can gain access to administrative or sensitive endpoints by crafting requests th...

GHSA-V897-PV23-R8CW Keycloak has an improper input validation vulnerability

A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remote attacker can craft requests to mask path segments,...

Keycloak has an improper input validation vulnerability

A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remote attacker can craft requests to mask path segments,...

CVE-2026-0976

A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remote attacker can craft requests to mask path segments,...

CVE-2026-0976 Org.keycloak/keycloak-quarkus-server: keycloak: proxy bypass due to improper handling of matrix parameters in url paths

A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remote attacker can craft requests to mask path segments,...

CVE-2026-0976

Keycloak contains an improper input validation vulnerability (CVE-2026-0976) where RFC-compliant matrix parameters in URL path segments can be processed in ways that bypass reverse-proxy path filtering, potentially exposing administrative or sensitive endpoints. Affected component commonly cited ...

EUVD-2026-2822

A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remote attacker can craft requests to mask path segments,...

CVE-2026-0976

A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remote attacker can craft requests to mask path segments,...

CVE-2026-0976 Org.keycloak/keycloak-quarkus-server: keycloak: proxy bypass due to improper handling of matrix parameters in url paths

A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remote attacker can craft requests to mask path segments,...

CVE-2026-0976

A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remote attacker can craft requests to mask path segments,...

PT-2026-2984

Name of the Vulnerable Software and Affected Versions Keycloak affected versions not specified Description A flaw exists in Keycloak related to improper input validation. The software accepts RFC-compliant matrix parameters within URL path segments, which may be ignored or mishandled by common...

Keycloak input validation error vulnerability

Keycloak is an open-source identity and access management solution developed by Keycloak itself. Keycloak has a vulnerability related to input validation. This vulnerability arises from improper input validation, as it accepts RFC-compliant matrix parameters from URL path segments. This could all...