# CVE-2026-6388

## Summary

- **CVE ID:** CVE-2026-6388
- **Severity:** CRITICAL
- **CVSS Score:** 9.1 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L)
- **CWE:** CWE-1220
- **Published:** Apr 15, 2026
- **Last Modified:** Jul 15, 2026

## Description

A flaw was found in ArgoCD Image Updater. This vulnerability allows an attacker, with permissions to create or modify an ImageUpdater resource in a multi-tenant environment, to bypass namespace boundaries. By exploiting insufficient validation, the attacker can trigger unauthorized image updates on applications managed by other tenants. This leads to cross-namespace privilege escalation, impacting application integrity through unauthorized application updates.

## Affected Products

No affected products listed.

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2026-6388)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2458766)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6388.json)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.36%
- **EPSS Percentile:** 28.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._