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CVE-2026-47724— nebula-mesh: API endpoints lack ownership checks, enabling cross-operator privilege escalation

CVSS 9.9 · Critical EPSS 0.02% · P7
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I. Basic Information for CVE-2026-47724

Vulnerability Information
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Vulnerability Title
nebula-mesh: API endpoints lack ownership checks, enabling cross-operator privilege escalation
Source: CVE Program / CVE List V5
Vulnerability Description
nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.4, the `/api/v1/*` route surface trusts the bearer token alone for authorisation on most endpoints. The codebase itself admits this at `internal/api/hosts.go:384`: "API trusts the bearer token for authorisation; per-CA ownership is enforced only in the Web layer." The Web UI gates state-changing routes through `loadAccessibleCA` (`internal/web/cas.go`); CA-management endpoints in `internal/api/cas.go` ALSO have proper `canAccessCA` gates. The gap is on the host, network, firewall, mobile-bundle, and most operator endpoints. Combined with the per-operator CA model from ADR 0002, this gives any non-admin operator API key broad cross-tenant access — instant privilege escalation in the worst case. Version 0.3.4 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
juevnebula-mesh < 0.3.4 -

II. Public POCs for CVE-2026-47724

#POC DescriptionSource LinkShenlong Link
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Qwen3.6-35B-A3B · 7302 chars
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III. Intelligence Information for CVE-2026-47724

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Patches & Fixes for CVE-2026-47724 (1)

Vendor Advisories for CVE-2026-47724 (1)

Same Patch Batch · juev · 2026-07-23 · 3 CVEs total

CVE-2026-477228.7 HIGHnebula-mesh: Host advanced overrides allow YAML injection into agent config.yml
CVE-2026-477237.1 HIGHnebula-mesh: Web UI and API responses lack security headers (CSP, X-Frame-Options, HSTS, e

IV. Related Vulnerabilities

Same product: nebula-mesh
Same vendor: juev
Same weakness: CWE-862

V. Comments for CVE-2026-47724

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