CVE-2026-53603

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Source
https://cve.org/CVERecord?id=CVE-2026-53603
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53603.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-53603
Aliases
Downstream
Related
Published
2026-09-04T19:40:31.548Z
Modified
2026-09-06T03:46:08.342538048Z
Severity
  • 7.1 (High) CVSS_V4 - 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 CVSS Calculator
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.

Database specific 
{
    "cwe_ids": [
        "CWE-312",
        "CWE-522"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53603.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/forgekeep/nebula-mesh

Affected ranges

Type
GIT
Repo
https://github.com/forgekeep/nebula-mesh
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
7cb01bab281ded557f8b6c81dab5f48d4c10182e
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.3.8"
        }
    ]
}

Affected versions

v0.*
v0.1.0
v0.1.1
v0.1.2
v0.2.0
v0.3.0
v0.3.1
v0.3.2
v0.3.3
v0.3.4
v0.3.5
v0.3.6
v0.3.7

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53603.json"