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.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

• https://access.redhat.com/security/cve/CVE-2026-121621
• https://bugzilla.redhat.com/show_bug.cgi?id=2565914
• https://github.com/argoproj-labs/argocd-image-updater/pull/1905