Kyverno up to 1.19.1 Variable Substitution Engine denial of service

Summaryinfo

A vulnerability was found in Kyverno and classified as problematic. This vulnerability affects unknown code of the component Variable Substitution Engine. Executing a manipulation can lead to denial of service. This vulnerability is tracked as CVE-2026-122314. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Kyverno and classified as problematic. This vulnerability affects an unknown code of the component Variable Substitution Engine. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect integrity, and availability. CVE summarizes:

Kyverno before 1.19.2 contains an unchecked type assertion in its variable-substitution engine that allows users who can submit resources to crash the policy engine. Attackers can submit resources with non-string fields referenced by {{- variable }} shallow substitution in policies, causing a panic that yields webhook denial of service and policy bypass under failurePolicy Ignore.

The advisory is available at github.com. This vulnerability was named CVE-2026-122314 since 11/05/2026. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 1.19.2 eliminates this vulnerability.

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Productinfo

Name

• Kyverno

Version

• 1.8.5
• 1.9.4
• 1.9.5
• 1.10.0
• 1.10.5
• 1.11.0
• 1.13
• 1.13.0
• 1.13.4
• 1.13.5
• 1.14.0
• 1.14.0-alpha.1
• 1.15.3
• 1.16.0
• 1.16.2
• 1.16.3
• 1.16.4
• 1.17.1
• 1.17.2
• 1.17.2-rc1
• 1.18.0
• 1.18.2
• 1.19.1

Website

• Product: https://github.com/kyverno/kyverno/

CPE 2.3info

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CPE 2.2info

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