GHSA-rc95-pcm8-65v9
Quarkus has Authentication/Authorization bypasses
Quick fix
GHSA-rc95-pcm8-65v9 — io.quarkus:quarkus-vertx-http: upgrade to the fixed version with the command below.
# pom.xml: bump <version>3.20.6.1</version> for io.quarkus:quarkus-vertx-http Details
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 bypass HTTP path-based authorization policies by appending a semicolon (`;`) and arbitrary text to the request URL. The vulnerability arises from a path-normalization inconsistency: Quarkus's [security layer](https://quarkus.io/guides/security-authorize-web-endpoints-reference) performs authorization checks on the raw URL path (which preserves matrix parameters), whereas RESTEasy Reactive's routing layer strips matrix parameters before matching endpoints. This allows requests like `/api/admin;anything` to bypass policies protecting `/api/admin` while still routing to the protected endpoint.
### Impact
This issue may lead to Authentication/Authorization bypasses.
### Credits
This issue was discovered with the [GitHub Security Lab Taskflow Agent](https://github.com/GitHubSecurityLab/seclab-taskflow-agent) and manually verified by GHSL team members [@p- (Peter Stöckli)](https://github.com/p-) and [@m-y-mo (Man Yue Mo)](https://github.com/m-y-mo).
Are you affected?
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Affected packages
0 Fixed in: 3.20.6.1 # pom.xml: bump <version>3.20.6.1</version> for io.quarkus:quarkus-vertx-http 3.21.0 Fixed in: 3.27.3.1 # pom.xml: bump <version>3.27.3.1</version> for io.quarkus:quarkus-vertx-http 3.30.0 Fixed in: 3.33.1.1 # pom.xml: bump <version>3.33.1.1</version> for io.quarkus:quarkus-vertx-http 3.34.0 Fixed in: 3.35.1.1 # pom.xml: bump <version>3.35.1.1</version> for io.quarkus:quarkus-vertx-http References
- https://github.com/quarkusio/quarkus/security/advisories/GHSA-rc95-pcm8-65v9 [WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2026-39852 [ADVISORY]
- https://access.redhat.com/errata/RHSA-2026:11720 [WEB]
- https://access.redhat.com/errata/RHSA-2026:11721 [WEB]
- https://access.redhat.com/errata/RHSA-2026:13631 [WEB]
- https://access.redhat.com/errata/RHSA-2026:17789 [WEB]
- https://access.redhat.com/errata/RHSA-2026:25089 [WEB]
- https://access.redhat.com/errata/RHSA-2026:34608 [WEB]
- https://access.redhat.com/security/cve/CVE-2026-39852 [WEB]
- https://bugzilla.redhat.com/show_bug.cgi?id=2457819 [WEB]
- https://github.com/quarkusio/quarkus [PACKAGE]
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39852.json [WEB]