Vulnerability · Published Jul 30, 2026 · Assigned by Tigera
CVE-2026-41187Calico Tier Authorization Bypass via DeleteCollection
Medium 6.2
In plain English
A medium-severity incorrect authorization in Calico from Tigera. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Tigera | Calico | 0 – before 3.31.63.32.0 – before 3.32.1 |
| Tigera | Calico Enterprise | 0 – before 3.21.73.22.0 – before 3.22.5 |
| Tigera | Calico Cloud | 0 – before 22.4.0 |
Weakness: CWE-285, CWE-863 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:L/SA:H