CVE-2026-41187

EUVD-2026-51154
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 12.6%
Affected Products (NVD)
VendorProductVersion
tigeracalico
𝑥
< 3.21.7
tigeracalico
𝑥
< 3.31.6
tigeracalico
𝑥
≤ 22.4.0
tigeracalico
3.22.0 ≤
𝑥
< 3.22.4
tigeracalico
3.32.0 ≤
𝑥
< 3.32.1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/projectcalico/calico/pull/12731
https://github.com/projectcalico/calico/pull/12735
https://github.com/projectcalico/calico/pull/12736
https://github.com/projectcalico/calico/pull/12737
https://www.tigera.io/security-bulletins/tta-2026-006/