{"id":"CVE-2026-61699","summary":"nebula-mesh: Certificate revocation is never enforced at the mesh","details":"nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. Prior to version 0.7.1, revocation is the only in-band mechanism that isolates a compromised/offboarded host from a Nebula mesh. Because the blocklist never reaches any peer's config.yml, a Blocked host retains full overlay reachability to every peer under its CA (and internal services on the mesh) for up to 30d (agent) / 365d (mobile). An attacker who exfiltrates host.key+host.crt can run stock slackhq/nebula directly, ignore the agent's 403/410 poll responses, and stay connected after the operator revokes the host. Operator-visible state (UI shows blocked, audit log records it) is misleading. This issue has been patched in version 0.7.1.","aliases":["GHSA-cm26-5974-52h8","GO-2026-5986"],"modified":"2026-09-06T03:46:14.570063601Z","published":"2026-09-04T19:43:28.633Z","related":["openSUSE-SU-2026:21483-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61699.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-299","CWE-672"]},"references":[{"type":"WEB","url":"https://github.com/forgekeep/nebula-mesh/releases/tag/v0.7.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61699.json"},{"type":"ADVISORY","url":"https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-cm26-5974-52h8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61699"},{"type":"FIX","url":"https://github.com/forgekeep/nebula-mesh/commit/0426e2f224a9b1e2029029bf923c93ed39d21cdb"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/forgekeep/nebula-mesh","events":[{"introduced":"0"},{"fixed":"0426e2f224a9b1e2029029bf923c93ed39d21cdb"},{"fixed":"af6d0d4aabb69e4a66441fffc77cf36f954689fa"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.7.1"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v0.7.0","v0.6.0","v0.5.0","v0.4.0","v0.3.8","v0.3.7","v0.3.6","v0.3.5","v0.3.4","v0.3.3","v0.3.2","v0.3.1","v0.3.0","v0.2.0","v0.1.2","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61699.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"}]}