{"id":"CVE-2026-45021","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-45021","generatedAt":"2026-10-28T02:17:39.772Z","title":"Prior to 2.7.25, 2.9.15, 2.11.13, 2.12.10, and 2.13.5, the default kuma-cp config leaks the admin bootstrap token and signing keys to any webpage the operator visits while the control plane is reachable from their browser.","description":"Kuma is a modern Envoy-based service mesh that can run on every cloud across both Kubernetes and VMs. Prior to 2.7.25, 2.9.15, 2.11.13, 2.12.10, and 2.13.5, the default kuma-cp config leaks the admin bootstrap token and signing keys to any webpage the operator visits while the control plane is reachable from their browser. CorsAllowedDomains: [\".*\"] reflects any Origin, and LocalhostIsAdmin: true promotes requests from 127.0.0.1 to mesh-system:admin. A cross-origin fetch() from a malicious page returns the admin JWT and signing material. This vulnerability is fixed in 2.7.25, 2.9.15, 2.11.13, 2.12.10, and 2.13.5.","published":"2026-05-28T18:16:34.000Z","lastModified":"2026-10-25T23:10:00.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":5.1,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-346","CWE-942"],"affected":[],"epss":{"score":0.00204,"percentile":0.10249,"date":"2026-10-26","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 (0.20%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/kumahq/kuma/commit/8fefa8595d44eb68d922405702ed7a0826322907","source":"security-advisories@github.com"},{"url":"https://github.com/kumahq/kuma/pull/16416","source":"security-advisories@github.com"},{"url":"https://github.com/kumahq/kuma/pull/16423","source":"security-advisories@github.com"},{"url":"https://github.com/kumahq/kuma/pull/16424","source":"security-advisories@github.com"},{"url":"https://github.com/kumahq/kuma/pull/16425","source":"security-advisories@github.com"},{"url":"https://github.com/kumahq/kuma/pull/16426","source":"security-advisories@github.com"},{"url":"https://github.com/kumahq/kuma/pull/16427","source":"security-advisories@github.com"},{"url":"https://github.com/kumahq/kuma/security/advisories/GHSA-3vcp-chfh-f6r2","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-45021","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."}