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CVE-2026-41187
Calico Tier Authorization Bypass via DeleteCollection
Medium6.2EPSS 0.39%
- Published
- Updated
- Reserved
- Assigned by
- Tigera
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| TigeraCNA (assigner) | 4.0 | Medium6.2 | 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 |
| NVDNVD · Analyzed | 4.0 | Medium6.2 | 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 |
- EPSS (exploitation in 30 days)
- 0.39% · top 67% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.2.
Weakness
Affected products
- affected < 3.31.6
- affected 3.32.0 – < 3.32.1
- affected < 3.21.7
- affected 3.22.0 – < 3.22.5
- affected < 22.4.0
References (5)
- https://github.com/projectcalico/calico/pull/12731 (opens in a new tab)patch
- https://github.com/projectcalico/calico/pull/12735 (opens in a new tab)patch
- https://github.com/projectcalico/calico/pull/12736 (opens in a new tab)patch
- https://github.com/projectcalico/calico/pull/12737 (opens in a new tab)patch
- https://www.tigera.io/security-bulletins/tta-2026-006/ (opens in a new tab)vendor-advisory
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-41187)Record last updated .