CVE-2026-41187

medium

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.

References

https://www.tigera.io/security-bulletins/tta-2026-006/

https://github.com/projectcalico/calico/pull/12737

https://github.com/projectcalico/calico/pull/12736

https://github.com/projectcalico/calico/pull/12735

https://github.com/projectcalico/calico/pull/12731

Details

Source: Mitre, NVD

Published: 2026-07-30

Updated: 2026-08-08

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:C/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Severity: Medium

CVSS v4

Base 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

Severity: Medium

EPSS

EPSS: 0.00272