RHSA-2026-9448 release notes and known issues

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.1.7

Scope: Red Hat OpenShift Service Mesh. This update record adds version, fix and known-issue context. Its publication date is not a lifecycle boundary.

Summary

Red Hat OpenShift Service Mesh 3.1.7 This update has a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Red Hat OpenShift Service Mesh 3.1.7, which is based on the open source Istio project, addresses a variety of problems in a microservice architecture by creating a centralized point of control in an application. Fixes/Improvements: Security Fix(es): * istio-rhel9-operator: Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679) * istio-cni-rhel9: Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679) * istio-pilot-rhel9: Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679) * istio-proxyv2-rhel9: Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679) * istio-proxyv2-rhel9: gRPC-Go: Authorization bypass due to improper HTTP/2 path validation (CVE-2026-33186) * istio-proxyv2-rhel9: BuildKit: Arbitrary file write and code execution via untrusted frontend (CVE-2026-33747) * istio-proxyv2-rhel9: BuildKit: Unauthorized file access via Git URL fragment subdir components (CVE-2026-33748) * istio-cni-rhel9: Go JOSE: Denial of Service via crafted JSON Web Encryption (JWE) object (CVE-2026-34986) * istio-pilot-rhel9: Go JOSE: Denial of Service via crafted JSON Web Encryption (JWE) object (CVE-2026-34986) Bug Fix(es): * OSSM operator metrics reader ClusterRole conflicts with other operators (OSSM-13106)

Known issues

Publisher statement

Not stated. The verified publisher record does not contain a known-issues statement.

Affected products and versions

Products

Red Hat OpenShift Service Mesh

Affected versions

Red Hat OpenShift Service Mesh 3.1

Fixed versions or updates

No fixed version is stated in this record.

Recommended action

Apply the Red Hat updates listed in the official advisory.

Related vulnerabilities

BlackTree CVE Intelligence

CVE-2026-25679Open CVE report →CVE-2026-33186Open CVE report →CVE-2026-33747Open CVE report →CVE-2026-33748Open CVE report →CVE-2026-34986Open CVE report →

Official publisher evidence

RED HATVERIFIED

Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.1.7

Checked 29 Sep 2026. BlackTree preserves the last verified facts if a later source check is temporarily unavailable.

Open the official publisher source