{"id":"CVE-2026-53603","aliases":["GHSA-q4vm-pq3q-8wgq","GO-2026-5991"],"url":"https://o3.security/vulnerability/CVE-2026-53603","summary":"nebula-mesh: Operator session tokens stored in plaintext in the database","details":"nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. Prior to version 0.3.8, Operator session tokens are stored in plaintext in the operator_sessions table (the token column is the PRIMARY KEY). The session token is a 32-byte random hex value sent directly in a cookie and valid for 24 hours. Anyone who can read the database (backup, snapshot, file copy, or SQL-level disclosure) obtains every active session token and can hijack operator sessions directly, with no further authentication. This issue has been patched in version 0.3.8.","published":"2026-09-04T19:40:31.548Z","modified":"2026-09-10T03:31:01.257842551Z","cvss":null,"epss":{"score":0.00204,"percentile":0.10622,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/forgekeep/nebula-mesh","fixedVersion":"0.3.8"}],"fix":{"url":"https://github.com/forgekeep/nebula-mesh/commit/7cb01bab281ded557f8b6c81dab5f48d4c10182e","label":"forgekeep/nebula-mesh@7cb01ba"},"references":[{"type":"WEB","url":"https://github.com/forgekeep/nebula-mesh/releases/tag/v0.3.8"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53603.json"},{"type":"ADVISORY","url":"https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-q4vm-pq3q-8wgq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53603"},{"type":"FIX","url":"https://github.com/forgekeep/nebula-mesh/commit/7cb01bab281ded557f8b6c81dab5f48d4c10182e"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-10T03:31:01.257842551Z"}}