What is CVE-2026-121621?

CVE-2026-121621 is a high-severity vulnerability in Red Hat Openshift Gitops, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-11-03.

How severe is CVE-2026-121621?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in Red Hat Openshift Gitops

CVE-2026-121621

A command injection vulnerability was found in Argo CD Image Updater, where a proxy URL configured on an SSH Git repository is passed unsanitized into a shell-interpreted SSH command. An attacker able to set a malicious proxy value can inject shell metacharacters to execute arbitrary commands and access credentials in the context of the Image Updater process.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-11-03 · last modified 2026-11-03.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Red Hat Openshift Gitops

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

access.redhat.com/security/cve/CVE-2026-121621 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)
github.com/argoproj-labs/argocd-image-updater/pull/1905

Frequently asked questions

What is CVE-2026-121621?: CVE-2026-121621 is a high-severity vulnerability in Red Hat Openshift Gitops, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-11-03.
How severe is CVE-2026-121621?: High severity. CVSS v3 base score is 8.8 out of 10.