CVE-2026-41187

6.2 mediumEPSS 0.4%

Medium (6.2) in tigera calico. EPSS 0.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 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

CVSS 3.1

6.5 medium

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

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 32% of CVEs (scores of 2026-10-31)
CWEs: CWE-285, CWE-863
Published: 2026-07-30
Modified: 2026-08-08
Record from: the NVD, synced 2026-10-19

Affected

tigera:calico

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/

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