CVE-2026-41187

Calico Tier Authorization Bypass via DeleteCollection

Published Jul 30, 2026 CVSS 4.0 · 6.2 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Tigera
Tigera calico
Tigera calico Cloud
Tigera calico Enterprise
Vendors & Products Tigera
Tigera calico
Tigera calico Cloud
Tigera calico Enterprise
Type Values Removed Values Added
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.
Title Calico Tier Authorization Bypass via DeleteCollection
Weaknesses CWE-285
CWE-863
References
Metrics cvssV4_0

{'score': 6.2, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Tigera
Published
Updated
Jul 30, 2026, 4:11 PM
Reserved
Apr 17, 2026, 5:41 PM
Status
Analyzed
Published
Jul 30, 2026, 3:16 PM
Modified
Aug 8, 2026, 1:16 AM