CVE-2026-122308: Kyverno before 1.19.2 Label Spoofing via Generation Handler processRequest

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

• kyverno kyverno

  • 1.19.2not affected
  • before 1.19.2affected · semver

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• kyverno kyvernobefore 1.19.2

Other highest-scoring records for the same primary product.

• CVE-2026-4789Kyverno, versions 1.16.0 and later, are vulnerable to SSRF due to unrestricted CEL HTTP functions.
  39Monitor
• CVE-2026-22039Kyverno Cross-Namespace Privilege Escalation via Policy apiCall
  39Monitor
• CVE-2026-54523Kyverno: NamespacedGeneratingPolicy generator.apply() namespace argument unvalidated -- background controller creates RoleBindings in any namespace including…
  38Monitor

Published before and after this one in the same product

• ← EarlierCVE-2026-122306Nov 5, 2026 · Kyverno before 1.19.2 Denial of Service via Exponential-Time Wildcard Matching
  33Monitor
• ← EarlierCVE-2026-122307Nov 5, 2026 · Kyverno before 1.19.2 Policy Bypass via admissionpolicygenerator PolicyException Handling
  33Monitor
• Later →CVE-2026-122309Nov 5, 2026 · Kyverno before 1.19.2 Denial of Service via Unbounded CEL Policy Evaluation Cost
  32Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

The endpoint fetches the record by the ID sent in the request, but never checks whether the record belongs to the requesting user.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1const invoice = await Invoice.findById(req.params.id);2res.json(invoice);

1const invoice = await Invoice.findOne({2  id: req.params.id,3  ownerId: req.user.id,4});5if (!invoice) return res.sendStatus(404);6res.json(invoice);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.