{"id":"CVE-2026-63464","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. From version 0.6.0 to before version 0.7.2, non-admin operators (role user) can set allow_private: true on their own managed webhook subscription (POST/PATCH /api/v1/w…","severity":"high","cvss":7.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","cwe":["CWE-862","CWE-918"],"vendor":"forgekeep","product":"nebula-mesh","affected":["nebula-mesh >= 0.6.0, < 0.7.2"],"patched":["github.com/forgekeep/nebula-mesh 0.7.2"],"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-2026-63464","references":[{"url":"https://github.com/forgekeep/nebula-mesh/commit/f3c54530e388dd21763e548923426e60a8e93ff0","label":"security-advisories@github.com"},{"url":"https://github.com/forgekeep/nebula-mesh/releases/tag/v0.7.2","label":"security-advisories@github.com"},{"url":"https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-7rx3-5wx3-5v76","label":"security-advisories@github.com"},{"url":"https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-7rx3-5wx3-5v76","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/forgekeep/nebula-mesh"}],"tags":["nvd","cve.org","exploit-available","osv","go"],"epss":0.00266,"epssPercentile":0.18804,"aliases":["GHSA-7rx3-5wx3-5v76","GO-2026-5985"],"ecosystem":"go","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-08T17:49:44.900617Z"},"ingestedAt":"2026-09-05T19:33:47.043Z","slug":"CVE-2026-63464","body":"## Overview\n\nnebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. From version 0.6.0 to before version 0.7.2, non-admin operators (role user) can set allow_private: true on their own managed webhook subscription (POST/PATCH /api/v1/webhook-subscriptions). No admin check exists on this field. At delivery time, allow_private switches the dispatcher to an unguarded HTTP client, bypassing the private/loopback/link-local SSRF guard — letting a low-privilege operator make the server request internal addresses. This issue has been patched in version 0.7.2.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-63464)\n\nAffected packages:\n\n- `github.com/forgekeep/nebula-mesh >= 0.6.0, < 0.7.2`\n\nPatched in:\n\n- `github.com/forgekeep/nebula-mesh 0.7.2`\n\nSource: https://osv.dev/vulnerability/GHSA-7rx3-5wx3-5v76","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":42.4,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":8197,"id":"CVE-2026-63464","ts":1788919979710,"field":"exploit_available","old":"false","new":"true"},{"seq":8006,"id":"CVE-2026-63464","ts":1788919279029,"field":"exploit_available","old":"true","new":"false"},{"seq":7815,"id":"CVE-2026-63464","ts":1788916338497,"field":"exploit_available","old":"false","new":"true"},{"seq":7624,"id":"CVE-2026-63464","ts":1788915295763,"field":"exploit_available","old":"true","new":"false"},{"seq":7433,"id":"CVE-2026-63464","ts":1788912701277,"field":"exploit_available","old":"false","new":"true"},{"seq":7242,"id":"CVE-2026-63464","ts":1788911329720,"field":"exploit_available","old":"true","new":"false"},{"seq":7046,"id":"CVE-2026-63464","ts":1788909065928,"field":"exploit_available","old":"false","new":"true"},{"seq":6858,"id":"CVE-2026-63464","ts":1788907389319,"field":"exploit_available","old":"true","new":"false"},{"seq":6660,"id":"CVE-2026-63464","ts":1788905432600,"field":"exploit_available","old":"false","new":"true"},{"seq":6478,"id":"CVE-2026-63464","ts":1788903457521,"field":"exploit_available","old":"true","new":"false"},{"seq":6273,"id":"CVE-2026-63464","ts":1788901800865,"field":"exploit_available","old":"false","new":"true"},{"seq":6103,"id":"CVE-2026-63464","ts":1788899560070,"field":"exploit_available","old":"true","new":"false"},{"seq":5914,"id":"CVE-2026-63464","ts":1788898152716,"field":"exploit_available","old":"false","new":"true"},{"seq":5803,"id":"CVE-2026-63464","ts":1788895710667,"field":"exploit_available","old":"true","new":"false"},{"seq":5675,"id":"CVE-2026-63464","ts":1788894526764,"field":"exploit_available","old":"false","new":"true"},{"seq":5633,"id":"CVE-2026-63464","ts":1788891871038,"field":"exploit_available","old":"true","new":"false"},{"seq":5597,"id":"CVE-2026-63464","ts":1788890891131,"field":"exploit_available","old":"false","new":"true"}]}