What is CVE-2026-18874?

CVE-2026-18874 is a medium-severity vulnerability in Red Hat Advanced Cluster Management For Kubernetes 2, classified under Code Injection. CVSS score: 6.2/10. Published 2026-08-19.

How severe is CVE-2026-18874?

Medium severity. CVSS v3 base score is 6.2 out of 10.

RCE in Red Hat Advanced Cluster Management For Kubernetes 2

CVE-2026-18874

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.

Vulnerability class: RCE (Remote Code Execution)

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:H.

Affected products

Red Hat Advanced Cluster Management For Kubernetes 2

Weakness classification (CWE)

CWE-94 — Code Injection

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-18874?: CVE-2026-18874 is a medium-severity vulnerability in Red Hat Advanced Cluster Management For Kubernetes 2, classified under Code Injection. CVSS score: 6.2/10. Published 2026-08-19.
How severe is CVE-2026-18874?: Medium severity. CVSS v3 base score is 6.2 out of 10.