CVSS 4.0
7.1 highCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:NCVE-2026-53603
High (7.1). EPSS 0.4% chance of exploitation in the next 30 days. Fixed in github.com/forgekeep/nebula-mesh 0.3.8.
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.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 28% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-312, CWE-522
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-q4vm-pq3q-8wgq | Go | github.com/forgekeep/nebula-mesh | <0.3.8 | 0.3.8 |
| GO-2026-5991 | Go | github.com/forgekeep/nebula-mesh | <0.3.8 | 0.3.8 |