Command Injection Vulnerability in Argo CD Image Updater by Red Hat
CVE-2026-121621

8.8HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Openshift Gitops
Vendor
CVE Published:
3 November 2026

What is CVE-2026-121621?

A command injection vulnerability in the Argo CD Image Updater allows attackers to exploit unsanitized input. Specifically, when a proxy URL is configured on an SSH Git repository, it is improperly passed into a shell-interpreted SSH command. This flaw enables an attacker with the ability to set a malicious proxy value to inject shell metacharacters, resulting in the execution of arbitrary commands. As a consequence, sensitive credentials may be accessed within the context of the Image Updater process, posing a serious risk to systems using this tool.

References

https://access.redhat.com/security/cve/CVE-2026-121621
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2565914
issue-trackingx_refsource_REDHAT
https://github.com/argoproj-labs/argocd-image-updater/pul...

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.