CVE-2026-6388

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.

CVSS 3.1

9.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L

EPSS

0.4% chance of exploitation in the next 30 days; higher than 29% of CVEs (scores of 2026-10-26)

CWE

CWE-1220

Published

2026-04-15

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

References

• https://access.redhat.com/security/cve/CVE-2026-6388
• https://bugzilla.redhat.com/show_bug.cgi?id=2458766
• https://access.redhat.com/security/cve/CVE-2026-6388
• https://bugzilla.redhat.com/show_bug.cgi?id=2458766
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6388.json

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