{"id":"CVE-2026-41187","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-41187","generatedAt":"2026-10-28T08:36:45.266Z","title":"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.","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.","published":"2026-07-30T15:16:32.000Z","lastModified":"2026-08-08T01:16:27.000Z","status":"Analyzed","sourceIdentifier":"psirt@tigera.io","cvss":{"version":"4.0","score":6.2,"severity":"MEDIUM","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/M"},"cwe":["CWE-285","CWE-863"],"affected":["tigera/calico"],"epss":{"score":0.00388,"percentile":0.32739,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.39%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/projectcalico/calico/pull/12731","tags":["Issue Tracking","Patch"],"source":"psirt@tigera.io"},{"url":"https://github.com/projectcalico/calico/pull/12735","tags":["Issue Tracking","Patch"],"source":"psirt@tigera.io"},{"url":"https://github.com/projectcalico/calico/pull/12736","tags":["Issue Tracking","Patch"],"source":"psirt@tigera.io"},{"url":"https://github.com/projectcalico/calico/pull/12737","tags":["Issue Tracking","Patch"],"source":"psirt@tigera.io"},{"url":"https://www.tigera.io/security-bulletins/tta-2026-006/","tags":["Vendor Advisory"],"source":"psirt@tigera.io"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-41187","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}