# CVE-2026-124440

Kyverno apiCall URL parsing flaw lets namespace policies escalate to cluster-admin.

- Page: https://www.vulneraibility.com/cve/CVE-2026-124440
- CVSS: 9.4
- Known exploited: not in CISA KEV as of our last sync
- EPSS: 0.55% (percentile 46.2)
- Weakness: CWE-441
- Also known as: GHSA-39w8-hv5g-f73w
- Published: 2026-11-08

## Affected versions

- kyverno: affected >= 1.19.1 and < 1.19.2; fixed in 1.19.2

A version outside these ranges is not a statement that it is unaffected.

## Impact

Namespace attacker can bypass apiCall clamp to issue cross-namespace/cluster API calls, read resources, create mutating webhooks and escalate to cluster-admin.

## Action

Immediate action required

## Recommendation

Upgrade Kyverno to v1.19.2+, rotate credentials, audit/delete suspicious webhooks and secrets

## References

- [advisory] https://github.com/kyverno/kyverno/security/advisories/GHSA-39w8-hv5g-f73w
- [advisory] https://www.vulncheck.com/advisories/kyverno-1.19.1-privilege-escalation-via-apicall-namespace-clamp-bypass

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.