← Vulnerability feed

Vulnerability record · CVE-2026-6388 · published 15 April 2026

CVE-2026-6388: A flaw was found in ArgoCD Image Updater.

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.

9.1 CVSS 3.1 Critical EPSS 0.41% · top 67.6% CWE-1220 · CWE-1220 Awaiting Analysis
9.1CVSS 3.1 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
15 Jul 2026Last modified by NVD

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.

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

References

LinkTags
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

Track CVE-2026-6388 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2026-56155Microsoft AD FS access control flaw allows local privilege elevationActive Directory Federation Services (AD FS) on multiple Windows client and server versions has insufficient granularity in its access control, letti…KEVEPSS 0.35%analysed7.8CVE-2026-33825Microsoft Defender Antimalware Platform access control flaw allows local privilege escalationMicrosoft Defender Antimalware Platform has insufficient granularity of access control (CWE-1220), letting an authorized local attacker elevate privi…KEVEPSS 0.40%analysed9.8CVE-2025-31201Apple OS Pointer Authentication bypass via arbitrary read/writeApple removed vulnerable code that allowed an attacker holding arbitrary read and write capability to bypass Pointer Authentication across iOS, iPadO…KEVEPSS 14%analysed

Source: NIST National Vulnerability Database (record CVE-2026-6388), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.