CVE-2025-61686

Fixed in a distro release EPSS 17%CVSS 9.1

React Router is a router for React. In @react-router/node versions 7.0.0 through 7.9.3, @remix-run/deno prior to version 2.17.2, and @remix-run/node prior to version 2.17.2, if createFileSessionStorage() is being used from @react-router/node (or @remix-run/node/@remix-run/deno in Remix v2) with an unsigned cookie, it is possible for an attacker to cause the session to try to read/write from a location outside the specified session file directory. The success of the attack would depend on the permissions of the web server process to access those files. Read files cannot be returned directly to the attacker. Session file reads would only succeed if the file matched the expected session file format. If the file matched the session file format, the data would be populated into the server side session but not directly returned to the attacker unless the application logic returned specific session information. This issue has been patched in @react-router/node version 7.9.4, @remix-run/deno version 2.17.2, and @remix-run/node version 2.17.2.

Published 2026-01-10 · CVE record · OSV

Products: remix-run react-router, Red Hat Cryostat 4, Red Hat Gatekeeper 3, Logging Subsystem for Red Hat OpenShift, Red Hat Migration Toolkit for Applications 7, Red Hat Migration Toolkit for Applications 8, Red Hat Migration Toolkit for Containers, Red Hat Migration Toolkit for Virtualization, Red Hat Multicluster Engine for Kubernetes, Red Hat Network Observability Operator, Red Hat Node HealthCheck Operator, Red Hat OpenShift Lightspeed, Red Hat OpenShift Pipelines, Red Hat OpenShift Service Mesh 2, Red Hat OpenShift Service Mesh 3, Red Hat Advanced Cluster Management for Kubernetes 2, Red Hat Advanced Cluster Security 4, Red Hat Ansible Automation Platform 2, Red Hat build of Apache Camel - HawtIO 4, Red Hat build of Apicurio Registry 2, Red Hat Build of Kueue, Red Hat build of OptaPlanner 8, Red Hat Connectivity Link 1, Red Hat Data Grid 8, Red Hat Developer Hub, Red Hat Discovery 2, Red Hat Edge Manager 1, Red Hat Edge Manager preview, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 8, Red Hat JBoss Enterprise Application Platform Expansion Pack, Red Hat OpenShift AI (RHOAI), Red Hat OpenShift Container Platform 4, Red Hat Openshift Data Foundation 4, Red Hat OpenShift Dev Spaces, Red Hat OpenShift distributed tracing 3, Red Hat OpenShift GitOps, Red Hat OpenShift Virtualization 4, Red Hat Process Automation 7, Red Hat Quay 3, Red Hat Satellite 6, Red Hat Single Sign-On 7, Red Hat Trusted Artifact Signer, Red Hat Trusted Profile Analyzer

Fixed upstream

Distro releases