{"id":"CVE-2026-47724","aliases":["GHSA-598g-h2vc-h5vg","GO-2026-5139"],"url":"https://o3.security/vulnerability/CVE-2026-47724","summary":"nebula-mesh: API endpoints lack ownership checks, enabling cross-operator privilege escalation","details":"nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.4, the `/api/v1/*` route surface trusts the bearer token alone for authorisation on most endpoints. The codebase itself admits this at `internal/api/hosts.go:384`: \"API trusts the bearer token for authorisation; per-CA ownership is enforced only in the Web layer.\" The Web UI gates state-changing routes through `loadAccessibleCA` (`internal/web/cas.go`); CA-management endpoints in `internal/api/cas.go` ALSO have proper `canAccessCA` gates. The gap is on the host, network, firewall, mobile-bundle, and most operator endpoints. Combined with the per-operator CA model from ADR 0002, this gives any non-admin operator API key broad cross-tenant access — instant privilege escalation in the worst case. Version 0.3.4 fixes the issue.","published":"2026-07-23T20:20:59.494Z","modified":"2026-08-12T03:51:09.302967996Z","cvss":{"score":9.9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":{"score":0.00481,"percentile":0.39311,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/juev/nebula-mesh","fixedVersion":"0.3.4"}],"fix":{"url":"https://github.com/forgekeep/nebula-mesh/commit/9d8bcd7667ecd0c2975cc71fb35a02fe131f76f2","label":"forgekeep/nebula-mesh@9d8bcd7"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47724.json"},{"type":"ADVISORY","url":"https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-598g-h2vc-h5vg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47724"},{"type":"FIX","url":"https://github.com/forgekeep/nebula-mesh/commit/9d8bcd7667ecd0c2975cc71fb35a02fe131f76f2"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:09.302967996Z"}}