CVE-2026-41187

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/projectcalico/calico/pull/12731	Issue Tracking Patch
https://github.com/projectcalico/calico/pull/12735	Issue Tracking Patch
https://github.com/projectcalico/calico/pull/12736	Issue Tracking Patch
https://github.com/projectcalico/calico/pull/12737	Issue Tracking Patch
https://www.tigera.io/security-bulletins/tta-2026-006/	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:tigera:calico:::::enterprise:::*
	cpe:2.3:a:tigera:calico:::::open_source:::*
	cpe:2.3:a:tigera:calico:::::cloud:::*
	cpe:2.3:a:tigera:calico:::::enterprise:::*
	cpe:2.3:a:tigera:calico:::::open_source:::*

History

No history.

Information

Published : 2026-07-30 15:16

Updated : 2026-08-08 01:16

NVD link : CVE-2026-41187

Mitre link : CVE-2026-41187

CVE.ORG link : CVE-2026-41187

JSON object : View

Products Affected

tigera

calico

CWE

CWE-285

Improper Authorization

CWE-863

Incorrect Authorization

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