CVE-2026-41187

Calico Tier Authorization Bypass via DeleteCollection

State: Published
Severity: 6.2 Medium
Published: Jul 30, 2026
Updated: Jul 30, 2026
Reserved: Apr 17, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.2 Medium	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	Tigera

Weaknesses

CWE-285 Improper Authorization
CWE-863 Incorrect Authorization

Affected Products

Product	Versions
CalicoTigera	before 3.31.6Affected 3.32.0 to before 3.32.1Affected
Calico EnterpriseTigera	before 3.21.7Affected 3.22.0 to before 3.22.5Affected
Calico CloudTigera	before 22.4.0Affected

References

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