{"cve":"CVE-2026-61699","nvd":{"published":"2026-09-04T20:17:24.347","modified":"2026-09-08T21:05:26.920","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","score":8.1},"cwes":["CWE-299","CWE-672"],"references":["https://github.com/forgekeep/nebula-mesh/commit/0426e2f224a9b1e2029029bf923c93ed39d21cdb","https://github.com/forgekeep/nebula-mesh/releases/tag/v0.7.1","https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-cm26-5974-52h8","https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-cm26-5974-52h8"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:52:03.409947763+00:00"},"epss":{"cve":"CVE-2026-61699","score":0.00446,"percentile":0.38774,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-cm26-5974-52h8","url":"https://osv.dev/vulnerability/GHSA-cm26-5974-52h8","summary":"nebula-mesh: Certificate revocation is never enforced at the mesh","modified":"2026-07-21T19:19:17.488716227Z","packages":[{"ecosystem":"Go","name":"github.com/forgekeep/nebula-mesh","purl":"pkg:golang/github.com/forgekeep/nebula-mesh","ranges":["<0.7.1"],"fixed":["0.7.1"]}]},{"id":"GO-2026-5986","url":"https://osv.dev/vulnerability/GO-2026-5986","summary":"nebula-mesh: Certificate revocation is never enforced at the mesh in github.com/forgekeep/nebula-mesh","modified":"2026-07-21T19:15:34.811078406Z","packages":[{"ecosystem":"Go","name":"github.com/forgekeep/nebula-mesh","purl":"pkg:golang/github.com/forgekeep/nebula-mesh","ranges":["<0.7.1"],"fixed":["0.7.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}