{"id":"CVE-2026-41187","aliases":["EUVD-2026-51154","GHSA-38w4-qxg9-xg36"],"status":"published","title":"Calico Tier Authorization Bypass via DeleteCollection","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.","severity":{"version":"4.0","score":6.2,"vector":"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00388,"percentile":0.3336,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-285","CWE-863"],"published":"2026-07-30T14:45:04Z","modified":"2026-10-28T02:30:34Z","products":[{"vendor":"tigera","product":"calico"},{"vendor":"tigera","product":"calico cloud"},{"vendor":"tigera","product":"calico enterprise"}],"references":[{"url":"https://github.com/projectcalico/calico/pull/12731","tags":["patch","Issue Tracking","Patch","fix"]},{"url":"https://github.com/projectcalico/calico/pull/12735","tags":["patch","Issue Tracking","Patch","fix"]},{"url":"https://github.com/projectcalico/calico/pull/12736","tags":["patch","Issue Tracking","Patch","fix"]},{"url":"https://github.com/projectcalico/calico/pull/12737","tags":["patch","Issue Tracking","Patch","fix"]},{"url":"https://www.tigera.io/security-bulletins/tta-2026-006/","tags":["vendor-advisory","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41187","tags":["advisory"]},{"url":"https://www.tigera.io/security-bulletins/tta-2026-006"},{"url":"https://github.com/advisories/GHSA-38w4-qxg9-xg36"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41187.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-41187","title":"Calico Tier Authorization Bypass via DeleteCollection","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.","status":"published","published":"2026-07-30T14:45:04.247Z","modified":"2026-07-30T16:11:27.341Z","cvss":[{"version":"4.0","score":6.2,"vector":"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","level":"medium","assessor":"cna"}],"cwes":["CWE-285","CWE-863"],"updated_at":"2026-11-02T13:41:08.498858Z"}],"euvd":[{"id":"EUVD-2026-51154","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.","status":"published","published":"2026-07-30T14:45:04Z","modified":"2026-07-30T16:11:27Z","cvss":[{"version":"4.0","score":6.2,"vector":"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","level":"medium"}],"updated_at":"2026-11-02T18:02:28.035906Z"}],"ghsa":[{"id":"GHSA-38w4-qxg9-xg36","title":"Calico's apiserver wraps tier-scoped resources so that every operation runs through...","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.","status":"published","published":"2026-07-30T15:31:52Z","modified":"2026-08-08T03:32:14Z","cvss":[{"version":"4.0","score":6.2,"vector":"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","level":"medium"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-285"],"updated_at":"2026-11-02T15:10:12.306859Z"}],"nvd":[{"id":"CVE-2026-41187","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.","status":"published","published":"2026-07-30T15:16:31.86Z","modified":"2026-08-08T01:16:27.19Z","cvss":[{"version":"4.0","score":6.2,"vector":"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","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-285","CWE-863"],"updated_at":"2026-11-02T14:12:33.955581Z"}],"osv":[{"id":"CVE-2026-41187","title":"Calico Tier Authorization Bypass via DeleteCollection","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.","status":"published","published":"2026-07-30T14:45:04.247Z","modified":"2026-10-28T02:30:34.403052871Z","cvss":[{"version":"4.0","score":6.2,"vector":"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","level":"medium"}],"cwes":["CWE-285","CWE-863"],"updated_at":"2026-11-02T15:45:03.424067Z"}]}}