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  4. CVE 2026 124440 kyverno 1191 privilege escalation via apicall
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Back to active CVEs
Critical · CVSS 9.4CVE-2026-124440

Kyverno 1.19.1 Privilege Escalation via apiCall Namespace Clamp BypassCVE-2026-124440

Answer in brief

CVE-2026-124440 records a Critical severity (CVSS 9.4) vulnerability in Kyverno 1.19.1 Privilege Escalation via apiCall Namespace Clamp Bypass. The current sources do not mark it as known exploited. The current feed maps kyverno/kyverno (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 8, 2026Updated Nov 8, 2026Source checked Nov 8, 2026First seen by HOL Nov 8, 2026Material review Nov 8, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.4
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 9.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps kyverno/kyverno (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
kyverno/kyvernogeneric>=1.19.1 <1.19.21.19.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for kyverno/kyverno.
  2. 2Review the reported fix. Update kyverno/kyverno to 1.19.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 8, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

Kyverno from 1.19.1 before 1.19.2 contains an authorization bypass vulnerability in the apiCall namespace clamp that allows namespace tenants to issue cross-namespace and cluster-scoped API requests by appending malformed percent-escapes to urlPath. Attackers can create namespaced Policies whose apiCall runs as the admission-controller ServiceAccount to read other namespaces' resources and create mutating webhooks, escalating to cluster admin.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
SSRF
EPSS
Not reported
CWE IDs
CWE-441
Source
CVE List V5
Source checked
Nov 8, 2026
References
2 linked sources
Open source record