[UPDATE] [medium] Red Hat OpenShift Service Mesh (Kiali): Vulnerability allows Denial of Service

CSIRTS triage

What

A vulnerability in Red Hat OpenShift Service Mesh allows a remote, anonymous attacker to carry out a Denial of Service attack.

Who is affected

Deployments of Red Hat OpenShift Service Mesh are affected by this vulnerability.

Urgency

Remediation is necessary to prevent potential service disruption.

Action

Update OpenShift Service Mesh to the latest version to address this vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source

CERT-Bund (BSI) Security Advisories (DE · national-cert · site)

Severity

medium

Published

2026-07-16

Exploitation

Not in CISA KEV at last sync

Language

Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0479

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Moderate exploitation riskCVE-2026-256392.5% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 83% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• high[UPDATE] [high] Red Hat Ansible Automation Platform: Multiple vulnerabilitiescert-bund
• high[UPDATE] [high] Atlassian products (Bamboo, Bitbucket, Confluence, Crucible, Fisheye, and Jira): Multiple vuln…cert-bund

Recent advisories for Red Hat OpenShift

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

• highCVE-2026-18381: A flaw was found in the koku-metrics-operator for Red Hat OpenShift. The operator's CostManage…nvd · 2026-07-30
• medium[UPDATE] [medium] Red Hat OpenShift Container Platform (Router): Vulnerability allows bypassing security measu…cert-bund · 2026-07-30
• medium[UPDATE] [medium] Red Hat OpenShift Container Platform (kubelet, cri-o, kube-apiserver): Vulnerability allows …cert-bund · 2026-07-30
• high[UPDATE] [high] Red Hat OpenShift Container Platform (gRPC-Go): Vulnerability allows bypassing security measur…cert-bund · 2026-07-30
• high[UPDATE] [high] Kiali for Red Hat OpenShift Service Mesh (Axios, Go, Follow-redirects): Multiple vulnerabiliti…cert-bund · 2026-07-30
• medium[NEW] [medium] Red Hat OpenShift Container Platform (fast-uri, OpenTelemetry-Go): Multiple vulnerabilitiescert-bund · 2026-07-30

More from CERT-Bund (BSI) Security Advisories

• medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow denial of service2026-07-31
• medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow Denial of Service2026-07-31
• medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow denial of service2026-07-31
• medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities2026-07-31
• medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow unspecified attack2026-07-31