CVE-2026-49258

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Source
https://cve.org/CVERecord?id=CVE-2026-49258
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49258.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-49258
Aliases
Downstream
Related
Published
2026-07-28T18:52:58Z
Modified
2026-08-12T03:51:27Z
Severity
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
Nebula Mesh: Web UI lacks ownership checks, enabling cross-operator access to hosts and networks (read, block, delete)
Details

Nebula Mesh is a self-hosted control plane for the Slack Nebula mesh VPN. In versions 0.3.5 and below, the web UI (/ui/*) does not apply the per-operator CA scoping employed by the JSON API. This was partially addressed by GHSA-598g-h2vc-h5vg, but the changes were not implemented in the web read/mutation surface. Any authenticated non-admin operator (for example, one created via self-registration or OIDC) can access resources belonging to other operators. The host create/edit/mobile-bundle/network-create paths and all CA-management routes were already correctly scoped. A malicious operator could block or delete any other operator's host, or read any operator's hosts and networks. This issue has been fixed in version 0.3.6.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-639",
        "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49258.json"
}
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
01fdc54a2bc2e885048636576cab998c6f2c7fe9
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.3.6"
        }
    ],
    "source": "AFFECTED_FIELD"
}

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

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49258.json"