{"id":"CVE-2026-47723","summary":"nebula-mesh: Web UI and API responses lack security headers (CSP, X-Frame-Options, HSTS, etc.)","details":"nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.1, none of the response paths in `internal/web/` or `internal/api/` set the standard browser-security headers. `grep` for `Content-Security-Policy`, `X-Frame-Options`, `Strict-Transport-Security`, `X-Content-Type-Options`, `Referrer-Policy` returns zero matches across the codebase. Version 0.3.1 fixes the issue.","aliases":["GHSA-w7w5-5gcp-38rw","GO-2026-5698"],"modified":"2026-07-27T03:56:27.237108747Z","published":"2026-07-23T20:17:26.478Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-1021"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47723.json"},"references":[{"type":"WEB","url":"https://github.com/forgekeep/nebula-mesh/releases/tag/v0.3.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47723.json"},{"type":"ADVISORY","url":"https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-w7w5-5gcp-38rw"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47723"},{"type":"FIX","url":"https://github.com/forgekeep/nebula-mesh/commit/b45fda5476c41ffcff1ca23058aef0fb851359c1"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/forgekeep/nebula-mesh","events":[{"introduced":"0"},{"fixed":"b45fda5476c41ffcff1ca23058aef0fb851359c1"},{"fixed":"ba059e1b5e409448d7f9bbf663be3c056d2f603f"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"0.3.1"}]}}],"versions":["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-2026-47723.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N"}]}