NIXPKGS-2026-1277

GitHub issue published on

Permalink CVE-2026-41323

8.1 HIGH

CVSS version: 3.1
Attack vector (AV): NETWORK
Attack complexity (AC): LOW
Privileges required (PR): LOW
User interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality impact (C): HIGH
Integrity impact (I): HIGH
Availability impact (A): NONE

updated 3 hours ago by @LeSuisse Activity log

Created automatic suggestion 2 days, 8 hours ago
@LeSuisse ignored reference https://g… 3 hours ago
@LeSuisse ignored package kyverno-chainsaw 3 hours ago
@LeSuisse ignored
2 references
- https://github.com/kyverno/kyverno/comm…
- https://github.com/kyverno/kyverno/comm…
3 hours ago
@LeSuisse accepted 3 hours ago
@LeSuisse published on GitHub 3 hours ago

Kyverno: ServiceAccount token leaked to external servers via apiCall service URL

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.