{"id":"CVE-2026-63464","state":"PUBLISHED","title":"Nebula-mesh allows non-admin operators to disable webhook SSRF protection via `allow_private`","description":"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/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.","publishedAt":"2026-09-04T19:44:10.117Z","updatedAt":"2026-09-08T17:50:11.907Z","severity":{"score":7.7,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["forgekeep nebula-mesh"],"affected":[{"vendor":"forgekeep","product":"nebula-mesh","versions":[{"version":">= 0.6.0, < 0.7.2","status":"affected"}]}],"references":["https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-7rx3-5wx3-5v76","https://github.com/forgekeep/nebula-mesh/commit/f3c54530e388dd21763e548923426e60a8e93ff0","https://github.com/forgekeep/nebula-mesh/releases/tag/v0.7.2"],"weaknesses":["CWE-862","CWE-918"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63464.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63464","state":"PUBLISHED","datePublished":"2026-09-04T19:44:10.117Z","dateUpdated":"2026-09-08T17:50:11.907Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-16T21:37:45.768Z"},"containers":{"cna":{"title":"Nebula-mesh allows non-admin operators to disable webhook SSRF protection via `allow_private`","descriptions":[{"lang":"en","value":"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/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."}],"affected":[{"vendor":"forgekeep","product":"nebula-mesh","versions":[{"version":">= 0.6.0, < 0.7.2","status":"affected"}]}],"references":[{"url":"https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-7rx3-5wx3-5v76","name":"https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-7rx3-5wx3-5v76","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/forgekeep/nebula-mesh/commit/f3c54530e388dd21763e548923426e60a8e93ff0","name":"https://github.com/forgekeep/nebula-mesh/commit/f3c54530e388dd21763e548923426e60a8e93ff0","tags":["x_refsource_MISC"]},{"url":"https://github.com/forgekeep/nebula-mesh/releases/tag/v0.7.2","name":"https://github.com/forgekeep/nebula-mesh/releases/tag/v0.7.2","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-04T19:44:10.117Z"},"source":{"advisory":"GHSA-7rx3-5wx3-5v76","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-7rx3-5wx3-5v76","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-08T17:49:44.900617Z","id":"CVE-2026-63464","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-08T17:50:11.907Z"}}]}}}