CVE-2026-18874mediumCWE-94

CVE-2026-18874: medium-severity vulnerability in Red Hat Advanced Cluster Management for…

Volsync-addon-controller: volsync-addon-controller: annotation values rendered into yaml via text/template without escaping allows yaml injection into subscription

Published · Updated

Follow this CVE+ Monitor Red Hat Advanced Cluster Management for Kubernetes

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.2epss 0.5%
A flaw was found in volsync-addon-controller. This vulnerability allows an attacker to inject malicious YAML (Yet Another Markup Language) code into the OpenShift Lifecycle Manager (OLM) Subscription resource. This is due to improper escaping of annotation values when they are rendered into YAML. Successful exploitation could lead to unauthorized modification or control over OLM Subscription configurations, potentially impacting software management within the cluster. This issue primarily affects systems where the 'volsync-addon-deploy-type: olm' annotation is explicitly enabled.
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:H
Affected products
Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.11Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.13Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.14Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.15Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.16Red Hat · Red Hat Advanced Cluster Management for Kubernetes 2.17
Related CVEs — Red Hat Advanced Cluster Management for…

In the same product, most dangerous first.

CVE-2026-71471CRITICALAcm-search-v2-rhel9: search-v2-operator: hub search cr collector.imageoverride propagated to every spoke as arbitrary container imageEPSS 1.2%CVE-2026-71472CRITICALAcm-search-v2-rhel9: search-v2-operator: shell-command and sql injection in postgresql-start.sh via cr-supplied work_memEPSS 0.9%CVE-2026-66793HIGHGovernance-policy-addon-controller: governance-policy-addon-controller: arbitrary container image override via managedclusteraddon annotation enables rce on spokeEPSS 0.8%CVE-2026-72508CRITICALMulticloud-operators-subscription: multicloud-operators-subscription: hub and spoke serviceaccounts bound to wildcard rbac (*/*/*)EPSS 0.8%CVE-2026-71469HIGHAcm-search-v2-api-rhel9: search-v2-api: unbounded tokenreviews cache allows unauthenticated memory-exhaustion dosEPSS 0.7%CVE-2026-76139HIGHAcm-operator-bundle: acm-operator-bundle: bundle build execs unpinned stolostron/release@master with full build credentialsEPSS 0.7%