CVE-2026-23881: Kyverno

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Kyverno is a policy engine designed for cloud native platform engineering teams. Versions prior to 1.16.3 and 1.15.3 have unbounded memory consumption in Kyverno's policy engine that allows users with policy creation privileges to cause denial of service by crafting policies that exponentially amplify string data through context variables. Versions 1.16.3 and 1.15.3 contain a patch for the vulnerability.

Affected products

• Kyverno Kyverno: before 1.15.3 (fixed in 1.15.3); from 1.16.0, before 1.16.3 (fixed in 1.16.3)

Published 2026-01-27. Last modified 2026-06-17.