CVE-2026-23881

HIGH

Kyverno < 1.15.3 - Denial of Service via Policy Engine Context Variable Amplification

Title source: llm
STIX 2.1

Description

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.

References (3)

Core 3

Scores

CVSS v3 7.7
EPSS 0.0053
EPSS Percentile 40.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (2)
kyverno/kyverno < 1.15.3
kyverno/kyverno 0 - 1.15.3Go
Published Jan 27, 2026
Tracked Since Feb 18, 2026