---
id: "CVE-2026-115325"
kind: "vulnerability"
aliases: ["CVE-2026-115325"]
title: "Netmaker: network users can take over WireGuard clients on other networks"
severity: "high"
cvss: 8.7
epss: 0.00289
exploited: false
status: "open"
category: "package"
products: [{"name": "netmaker", "fixed": [], "affected": "<= 1.7.0", "ecosystem": "github"}]
ecosystems: ["github"]
tags: ["authorization-bypass", "netmaker", "package", "self-hosted", "wireguard"]
not_affected_if: ["auth-required", "netmaker-not-used", "single-network-deployment"]
published_at: "2026-10-22T11:17:51+00:00"
first_seen_at: "2026-10-23T21:57:31+00:00"
updated_at: "2026-10-24T07:15:51+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115325", "first_seen_at": "2026-10-23T21:57:31+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-23T23:41:47+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-115325", "first_seen_at": "2026-10-24T07:15:51+00:00"}]
---

# Netmaker: network users can take over WireGuard clients on other networks

Netmaker up to and including 1.7.0: updateExtClient uses an unscoped lookup (GetExtClientByName), so a user with external-client permission on one network can PUT /api/extclients/{other-network}/{clientid} to replace public keys, disable clients and read WireGuard private keys. CVSS 8.7 (v4) / 8.3 (v3.1). Needs a valid account with ext-client rights. Fixed on master by PR #4153; no tagged release with the fix found yet.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- github:netmaker affected <= 1.7.0 fixed ?

## How to check

Run 'netmaker --version' or check the server image tag; 1.7.0 or earlier is affected. Check whether non-admin users hold external-client permissions on any network. Audit logs for PUT /api/extclients/{network}/{clientid} where the user is not scoped to that network.

## Fix

No patched release named yet. Build from master at or after commit 332d8b9bab030ee65e78b9141259e4e0e80ac4b0, or wait for the first release after v1.7.0. Until then, limit external-client permissions to trusted users. If abuse is suspected, rotate the keys of external clients.

## Timeline

- 2026-10-23T21:57:31+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-115325
- 2026-10-23T23:41:47+00:00 analyst — Fix is PR #4153 (commit 332d8b9, merged 2026-10-13, 2-line change scoping updateExtClient lookup by network). No release after v1.7.0 seen on GitHub releases page, so no patched version is named; checked 2026-10-23. No public PoC or exploitation found; social search not done.
- 2026-10-24T07:15:51+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-115325

## Documents

- [advisory] VulnCheck: Netmaker through 1.7.0 updateExtClient authorization bypass https://www.vulncheck.com/advisories/netmaker-through-1.7.0-authorization-bypass-via-updateextclient-unscoped-lookup
- [describes] gravitl/netmaker #3875 cross-network ext client modification https://github.com/gravitl/netmaker/issues/3875
- [fix] gravitl/netmaker PR #4153 fix (merged 2026-10-13, commit 332d8b9) https://github.com/gravitl/netmaker/pull/4153

## From the sources

Netmaker through 1.7.0 contains an authorization bypass vulnerability in the updateExtClient handler that allows network-scoped users to modify external clients on other networks. Attackers with external client permissions on one network can send PUT requests to /api/extclients/{network}/{clientid} to replace public keys, disable clients, and obtain WireGuard private keys.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_