CVE-2026-53603
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.
Scoring
- Severity
- HIGH
- CVSS base score
- 7.1
- CVSS 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
- EPSS probability
- 0.20%
- CWE
- CWE-312, CWE-522
- Published
- 2026-09-04
- Last modified
- 2026-09-08
Affected products
- forgekeep nebula-mesh
Weakness type
Related vulnerabilities
- CVE-2026-80058 — Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions prior to...
- CVE-2026-86280 — SourceCodester Syllabus-Aligned Learning Management & Examination System cict_portal.sql cleartext storage
- CVE-2026-83551 — Cleartext storage of HMAC signing key in Amazon SageMaker Python SDK @step/@remote pipeline path
- CVE-2026-77975 — Ebyte NA111-M Cleartext Storage of Sensitive Information
- CVE-2026-82699 — sambitraj Student Management System Password aca.sql cleartext storage
- CVE-2026-82640 — browser-use web-ui 2.0.0 through 3.0.0 Cleartext API Key Storage
- CVE-2026-77970 — Sensitive fields nested in embedded values are not redacted in AshPaperTrail versions
- CVE-2026-75847 — Sensitive attribute values stored in a non-sensitive public changes map in AshPaperTrail