kyverno before 1.19.1 Privilege Escalation via Policy apiCall urlPath
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.
CVE-2026-100706
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-100706
kyverno
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "kyverno",
"product": "kyverno",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "1.19.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.19.1",
"versionType": "semver"
}
],
"packageURL": "pkg:golang/github.com/kyverno/kyverno",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-100706
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #2428 · Revision 1
- Added to Heist Feed
- Publisher date