{"id":"CVE-2026-61699","title":"nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN","summary":"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 an…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-299","CWE-672"],"vendor":"forgekeep","product":"nebula-mesh","affected":["nebula-mesh < 0.7.1"],"patched":["github.com/forgekeep/nebula-mesh 0.7.1"],"published":"2026-09-04","updated":"2026-09-08","sourceUpdated":"2026-09-08T21:05:26.920","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-61699","references":[{"url":"https://github.com/forgekeep/nebula-mesh/commit/0426e2f224a9b1e2029029bf923c93ed39d21cdb","label":"security-advisories@github.com"},{"url":"https://github.com/forgekeep/nebula-mesh/releases/tag/v0.7.1","label":"security-advisories@github.com"},{"url":"https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-cm26-5974-52h8","label":"security-advisories@github.com"},{"url":"https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-cm26-5974-52h8","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-cm26-5974-52h8"}],"tags":["nvd","cve.org","exploit-available","ghsa","go"],"epss":0.00249,"epssPercentile":0.16567,"aliases":["GHSA-cm26-5974-52h8"],"ecosystem":"go","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-09-08T12:58:55.248635Z"},"ingestedAt":"2026-07-14T20:39:11.110Z","slug":"CVE-2026-61699","body":"## Overview\n\nnebula-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-61699)\n\nAffected packages:\n\n- `github.com/forgekeep/nebula-mesh < 0.7.1`\n\nPatched in:\n\n- `github.com/forgekeep/nebula-mesh 0.7.1`\n\nSource: https://github.com/advisories/GHSA-cm26-5974-52h8","depth":"midnight","depthScore":57,"depthScoreParts":{"impact":44.6,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":5391,"id":"CVE-2026-61699","ts":1788887278051,"field":"exploit_available","old":"false","new":"true"},{"seq":4274,"id":"CVE-2026-61699","ts":1788886392095,"field":"exploit_available","old":"true","new":"false"},{"seq":3023,"id":"CVE-2026-61699","ts":1788883055726,"field":"exploit_available","old":"false","new":"true"},{"seq":2052,"id":"CVE-2026-61699","ts":1788882460237,"field":"exploit_available","old":"true","new":"false"},{"seq":268,"id":"CVE-2026-61699","ts":1788881645501,"field":"exploit_available","old":"false","new":"true"}]}