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Medium · 6.2 CVE-2026-41187 EUVD-2026-51154GHSA-38w4-qxg9-xg36

Calico Tier Authorization Bypass via DeleteCollection

Published Jul 30, 2026 · Updated Jul 30, 2026 · Assigned by Tigera

Description

Calico's apiserver wraps tier-scoped resources so that every operation runs through AuthorizeTierOperation, but the Delete override on NetworkPolicy, GlobalNetworkPolicy, and their staged variants is not invoked for DeleteCollection requests. A user holding the deletecollection verb or wildcard verbs on tier-scoped policy resources can bulk-delete policies in tiers they otherwise have no rights on, breaking the tier authorization boundary.

Affected products

VendorProductAffectedFixed
Tigera Calico < 3.31.6, 3.32.0 – < 3.32.1 3.31.6
Tigera Calico Enterprise < 3.21.7, 3.22.0 – < 3.22.5 3.21.7
Tigera Calico Cloud < 22.4.0 22.4.0

References