CVE-2026-6388CRITICAL 9.1EPSS p22.8%
CVE-2026-6388CVE-2026-6388
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.
Scoring
| CVSS 3.1 | 9.1 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L |
| EPSS | 0.31% probability of exploitation · percentile 22.8% · 2026-06-19T12:03:05Z |
| Published | 2026-04-15 |
| Last modified | 2026-04-17 |
Underlying weaknesses· 1
References
1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Insufficient Granularity of Access Controlcwe-1220 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.