CVE-2026-41323
Published:April 24, 2026
Updated:April 26, 2026
Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4, Kyverno's apiCall feature in ClusterPolicy automatically attaches the admission controller's ServiceAccount token to outgoing HTTP requests. The service URL has no validation — it can point anywhere, including attacker-controlled servers. Since the admission controller SA has permissions to patch webhook configurations, a stolen token leads to full cluster compromise. Versions 1.18.0-rc1, 1.17.2-rc1, and 1.16.4 patch the issue.
Affected Packages
https://github.com/kyverno/kyverno.git (GITHUB):
Affected version(s) >=v1.16.0 <v1.16.4Fix Suggestion:
Update to version v1.16.4https://github.com/kyverno/kyverno.git (GITHUB):
Affected version(s) >=v1.17.0 <v1.17.2Fix Suggestion:
Update to version v1.17.2github.com/kyverno/kyverno (GO):
Affected version(s) >=v1.17.0 <v1.17.2Fix Suggestion:
Update to version v1.17.2github.com/kyverno/kyverno (GO):
Affected version(s) >=v0.0.0-20220524190511-4a6d5f78644a <v1.16.4Fix Suggestion:
Update to version v1.16.4Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.6
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
