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CVE-2026-100706

9.9 CRITICALpublic exploit available

Published 2026-09-26 · Updated 2026-09-28

AI risk analysis

Summary
The flaw allows namespace tenants to bypass per-namespace restrictions and create objects in other namespaces, leading to potential privilege escalation to cluster admin.
Exploitability
Exploitation is relatively straightforward given the ability to use percent-encoded directory traversal sequences, requiring attackers to have access to the affected kyverno version.
Blast radius
If exploited, the impact could be severe, as it allows attackers to create cluster-wide objects, significantly increasing the attack surface.
Detection
No reliable host or network indicator is derivable from the published description.
Prioritized remediation
Upgrade to kyverno 1.19.1 or later.
auth-bypassprivilege-escalationkubernetespolicy-bypass

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

kyverno before 1.19.1 fails to properly validate URL-encoded path segments in Policy apiCall urlPath, allowing namespace tenants to bypass the per-namespace clamp and create objects in other namespaces as the admission-controller ServiceAccount. Attackers can exploit this by using percent-encoded directory traversal sequences to create MutatingWebhookConfiguration objects cluster-wide or PolicyException objects in the kyverno namespace, enabling privilege escalation to cluster admin.

CVSS vector

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

Weaknesses

CWE-441

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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