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CVE-2023-3955: Kubernetes - Windows nodes - Insufficient input sanitization leads to privilege escalation

highCVSS 8.8CVE-2023-3955

CSIRTS triage

vendor: Kubernetesproduct: KubernetesPrivilege escalation
What
Insufficient input sanitization on Windows nodes allows privilege escalation.
Who is affected
Kubernetes clusters running Windows nodes.
Urgency
High priority; CVSS 8.8 severity with clear privilege escalation path.
Action
Upgrade Kubernetes to patched version or apply Windows node input sanitization fix.

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

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 8.8
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-3955

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2023-3955coverage & exploitation statusNVD · CVE.org

Recent advisories for Kubernetes - Windows

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.

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