CVE-2026-13676

Fixed in a distro release EPSS <1%CVSS 7.5

fast-uri versions 2.3.1 through 3.1.2 and 4.0.0 fail to canonicalize Unicode (IDN) hostnames for HTTP-family URLs. The IDN conversion path calls a helper that does not exist on the global URL constructor, silently leaving the host in its original Unicode form while normalize() and equal() still return values that differ from a WHATWG-compatible URL parser. Applications that use fast-uri to enforce host-based policy (denylists, loopback filtering, redirect validation, outbound proxy routing) before passing the same URL to Node's URL or fetch can be bypassed when the two implementations resolve the same input to different hosts. Patches: upgrade to fast-uri 3.1.3 for the 3.x line or 4.0.1 for the 4.x line. Workarounds: enforce host policy using the same URL parser used for the actual request, or reject non-ASCII hosts before policy checks.

Published 2026-06-29 · CVE record · OSV

Products: fast-uri, Red Hat AMQ Broker 7.13.6, Red Hat AMQ Broker 7.14.1, Red Hat Enterprise Linux 10, Red Hat Cluster Observability Operator 1.5.0, Red Hat multicluster engine for Kubernetes 2.11, Red Hat multicluster engine for Kubernetes 2.17, Red Hat Advanced Cluster Management for Kubernetes 2.16, Red Hat Advanced Cluster Management for Kubernetes 2.17, Red Hat Ansible Automation Platform 2.2, Red Hat Ansible Automation Platform 2.6, Red Hat Ansible Automation Platform 2.7, Red Hat Developer Hub 1.10, Red Hat Developer Hub 1.9, Red Hat Discovery 2, Red Hat Edge Manager 1.1, Red Hat Migration Toolkit 1.8, Red Hat Migration Toolkit for Applications 8.2, Red Hat OpenShift AI 3.4, Red Hat OpenShift Container Platform 4.16, Red Hat OpenShift Container Platform 4.17, Red Hat OpenShift Container Platform 4.19, Red Hat OpenShift Container Platform 4.20, Red Hat OpenShift Container Platform 4.21, Red Hat OpenShift Container Platform 4.22, Red Hat Openshift Data Foundation 4.18, Red Hat Openshift Data Foundation 4.19, Red Hat Openshift Data Foundation 4.20, Red Hat OpenShift Dev Spaces 3.29, Red Hat Quay 3.16, Red Hat Quay 3.9, Red Hat Satellite 6.18, Red Hat Satellite 6.19, Red Hat Confidential Compute Attestation, Red Hat Cryostat 4, Red Hat Network Observability Operator, Red Hat OpenShift Lightspeed, Red Hat OpenShift Pipelines, Red Hat OpenShift Serverless, Red Hat Ansible Automation Platform 2, Red Hat build of Apache Camel - HawtIO 4, Red Hat build of Apicurio Registry 3, Red Hat Build of Podman Desktop, Red Hat Connectivity Link 1, Red Hat Data Grid 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI), Red Hat OpenShift Container Platform 4, Red Hat OpenShift Virtualization 4, Red Hat Satellite 6, Red Hat Self-service automation portal 2

Fixed upstream

Distro releases