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NVD description
Beszel is a server monitoring platform. Prior to version 0.18.2, the hub's authenticated API endpoints GET /api/beszel/containers/logs and GET /api/beszel/containers/info pass the user-supplied "container" query parameter to the agent without validation. The agent constructs Docker Engine API URLs using fmt.Sprintf with the raw value instead of url.PathEscape(). Since Go's http.Client does not sanitize `../` sequences from URL paths sent over unix sockets, an authenticated user (including readonly role) can traverse to arbitrary Docker API endpoints on agent hosts, exposing sensitive infrastructure details. Version 0.18.4 fixes the issue.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
NONE
Momentum
STABLE
If you run products in this scope, you should treat this CVE as relevant to your environment.
CVE-2026-27734 Beszel is a server monitoring platform. Prior to version 0.18.2, the hub's authenticated API endpoints GET /api/beszel/containers/logs and GET /api/beszel/containers/… https://www.cve.org/CVERecord?id=CVE-2026-27734
Post summary
The text announces CVE‑2026‑27734 as affecting Beszel’s authenticated API endpoints prior to version 0.18.2, without providing additional technical details, PoC, or mitigation information.
CVE-2026-27734: Docker API Path Traversal in Beszel Agent via Unsanitized Input A path traversal vulnerability exists in the Beszel server monitoring agent, allowing authenticated users to access arbitrary Docker Engine API endpoints. The vulnerabilit... https://cvereports.com/reports/CVE-2026-27734
Post summary
A path traversal vulnerability in Beszel server monitoring agent allows authenticated users to access arbitrary Docker Engine API endpoints via unsanitized input.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | beszel | beszel | - | - | - |