CVE-2026-41187
Last modified
CVE-2026-41187 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.27% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Tigera | Calico | < 3.21.7 |
| Tigera | Calico | < 3.31.6 |
| Tigera | Calico | <= 22.4.0 |
| Tigera | Calico | >= 3.22.0, < 3.22.4 |
| Tigera | Calico | >= 3.32.0, < 3.32.1 |
References
- https://github.com/projectcalico/calico/pull/12731Issue Tracking, Patch
- https://github.com/projectcalico/calico/pull/12735Issue Tracking, Patch
- https://github.com/projectcalico/calico/pull/12736Issue Tracking, Patch
- https://github.com/projectcalico/calico/pull/12737Issue Tracking, Patch
- https://www.tigera.io/security-bulletins/tta-2026-006/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
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