{"id":"CVE-2026-55513","aliases":["GHSA-g4x6-jcvr-9m3g","GO-2026-5987"],"url":"https://o3.security/vulnerability/CVE-2026-55513","summary":"nebula-mesh: Web UI host creation ignores configured enrollment token TTL and mints 24-hour bearer enrollment tokens","details":"nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. From version 0.3.0 to before version 0.5.0, the nebula-mgmt Web UI host-creation path ignores both the server-wide enrollment_token_ttl security setting and per-network network_config.enrollment_token_ttl overrides. API host creation and token-regeneration paths use the configured TTL resolver, but POST /ui/hosts hardcodes now.Add(24 * time.Hour) for newly minted agent enrollment tokens. In deployments that intentionally reduce enrollment-token lifetime, any authenticated operator who can create a host through the Web UI can still mint a bearer enrollment token valid for about 24 hours. This issue has been patched in version 0.5.0.","published":"2026-09-04T19:43:18.876Z","modified":"2026-09-10T03:31:03.035341750Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},"epss":{"score":0.00187,"percentile":0.08346,"asOf":"2026-09-06"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/forgekeep/nebula-mesh","fixedVersion":"0.5.0"}],"fix":{"url":"https://github.com/forgekeep/nebula-mesh/commit/514006029e09f1991122b86a80e7b25970bcfa98","label":"forgekeep/nebula-mesh@5140060"},"references":[{"type":"WEB","url":"https://github.com/forgekeep/nebula-mesh/releases/tag/v0.5.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55513.json"},{"type":"ADVISORY","url":"https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-g4x6-jcvr-9m3g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55513"},{"type":"FIX","url":"https://github.com/forgekeep/nebula-mesh/commit/514006029e09f1991122b86a80e7b25970bcfa98"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-10T03:31:03.035341750Z"}}