CVE-2026-100706 (GCVE-0-2026-100706)

Vulnerability from cvelistv5 – Published: 2026-09-26 13:24 – Updated: 2026-09-26 23:08
VLAI
Title
kyverno before 1.19.1 Privilege Escalation via Policy apiCall urlPath
Summary
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.
Severity
9.4 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-26 23:08 UTC
CWE
  • CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6487 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
kyverno kyverno Affected: 0 , < 1.19.1 (semver)
Unaffected: 1.19.1 (semver)
    cpe:2.3:a:kyverno:kyverno:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-10 00:00
Credits
cherez0ff
Show details on NVD website
To clipboard 

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