This important security update for Red Hat build of Quarkus 3.27.3.SP1 addresses five vulnerabilities, including an authorization bypass via semicolons in HTTP requests in quarkus-vertx-http (CVE-2026-39852), an LDAP injection in bcprov-jdk18on (CVE-2026-0636), and a PKIX signature validation flaw in bcpkix-jdk18on (CVE-2026-5588). The update also resolves a GOSTCTR implementation issue (CVE-2025-14813) and an information disclosure/data corruption race condition in Apache Kafka Clients (CVE-2026-35554). Red Hat Product Security has rated this update as having a security impact of Important, and organizations should apply the patch to version 3.27.3.SP1 following standard procedures.
Red Hat Product Errata RHSA-2026:11721 - Security Advisory Issued: 2026-05-05 Updated: 2026-05-05 RHSA-2026:11721 - Security Advisory Overview Synopsis Important: Red Hat build of Quarkus 3.27.3.SP1 security update Type/Severity Security Advisory: Important Topic An update is now available for Red Hat build of Quarkus. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability. For more information, see the CVE links in the References section. Description This release of Red Hat build of Quarkus 3.27.3.SP1 includes the following CVE fixes: quarkus-vertx- http: io.quarkus:quarkus-vertx- http: Authorization bypass via semicolons in HTTP requests [quarkus-3.27] (CVE-2026-39852) bcprov-jdk18on: LDAP injection vulnerability in LDAPStoreHelper.java [quarkus-3.27] (CVE-2026-0636) bcpkix-jdk18on: PKIX draft CompositeVerifier accepts empty signature sequence as valid [quarkus-3.27] (CVE-2026-5588) bcprov-jdk18on: GOSTCTR implementation unable to process more than 255 blocks correctly [quarkus-3.27] (CVE-2025-14813) kafka-clients: Apache Kafka Clients: Information disclosure and data corruption due to race condition in producer buffer management [quarkus-3.27] (CVE-2026-35554) For more information, see the release notes page listed in the References section. Solution Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 Affected Products Red Hat build of Quarkus Text-Only Advisories x86_64 Fixes (none) CVEs CVE-2025-14813 CVE-2026-0636 CVE-2026-5588 CVE-2026-35554 CVE-2026-39852 References https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/products/quarkus/ https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=redhat.quarkus&downloadType=distributions&version=3.27.3.SP1 https://docs.redhat.com/en/documentation/red_hat_build_of_quarkus/3.27 The Red Hat security contact is secalert@redhat.com . More contact details at https://access.redhat.com/security/team/contact/ .