{"cve":"CVE-2026-53603","nvd":{"published":"2026-09-04T20:17:23.287","modified":"2026-09-08T21:05:26.920","status":"Deferred","description":"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.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":7.1},"cvss_v3":null,"cwes":["CWE-312","CWE-522"],"references":["https://github.com/forgekeep/nebula-mesh/commit/7cb01bab281ded557f8b6c81dab5f48d4c10182e","https://github.com/forgekeep/nebula-mesh/releases/tag/v0.3.8","https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-q4vm-pq3q-8wgq"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:52:03.409947763+00:00"},"epss":{"cve":"CVE-2026-53603","score":0.00352,"percentile":0.28878,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-q4vm-pq3q-8wgq","url":"https://osv.dev/vulnerability/GHSA-q4vm-pq3q-8wgq","summary":"nebula-mesh: Operator session tokens stored in plaintext in the database","modified":"2026-07-21T19:19:01.389253115Z","packages":[{"ecosystem":"Go","name":"github.com/forgekeep/nebula-mesh","purl":"pkg:golang/github.com/forgekeep/nebula-mesh","ranges":["<0.3.8"],"fixed":["0.3.8"]}]},{"id":"GO-2026-5991","url":"https://osv.dev/vulnerability/GO-2026-5991","summary":"nebula-mesh: Operator session tokens stored in plaintext in the database in github.com/forgekeep/nebula-mesh","modified":"2026-07-21T19:15:35.721769257Z","packages":[{"ecosystem":"Go","name":"github.com/forgekeep/nebula-mesh","purl":"pkg:golang/github.com/forgekeep/nebula-mesh","ranges":["<0.3.8"],"fixed":["0.3.8"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}