Calico Tier Authorization Bypass via DeleteCollection

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-41187
StatePUBLISHED
AssignerTigera
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-30 15:16:31 UTC
Updated2026-07-30 17:16:31 UTC
DescriptionCalico'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.

Risk And Classification

Primary CVSS: v4.0 6.2 MEDIUM from [email protected]

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: 0.002720000 probability, percentile 0.194160000 (date 2026-07-31)

Problem Types: CWE-285 | CWE-863 | CWE-285 CWE-285 Improper Authorization | CWE-863 CWE-863 Incorrect Authorization

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary6.2MEDIUMCVSS: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/C...
4.0CNACVSS6.2MEDIUMCVSS: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 v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
High
User Interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Sub Conf.
None
Sub Integrity
Low
Sub Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Tigera Calico affected 3.31.6 semver Not specified
CNA Tigera Calico affected 3.32.0 3.32.1 semver Not specified
CNA Tigera Calico Enterprise affected 3.21.7 semver Not specified
CNA Tigera Calico Enterprise affected 3.22.0 3.22.5 semver Not specified
CNA Tigera Calico Cloud affected 22.4.0 semver Not specified

References

ReferenceSourceLinkTags
github.com/projectcalico/calico/pull/12735 [email protected] github.com
github.com/projectcalico/calico/pull/12737 [email protected] github.com
github.com/projectcalico/calico/pull/12736 [email protected] github.com
github.com/projectcalico/calico/pull/12731 [email protected] github.com
www.tigera.io/security-bulletins/tta-2026-006 [email protected] www.tigera.io
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Behnam Shobiri (en)

CNA: Mazdak Nasab (en)

CNA: Anthony Tam (en)

CNA: Matt Dupre (en)

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