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The vulnerability stems from missing authorization checks in two critical API endpoints: the device bulk actions and the device update API. This oversight allows any authenticated user, regardless of their organization, to interact with devices they should not have access to. The core of the attack lies in manipulating device identifiers. An attacker can intercept API requests to these endpoints and replace a legitimate device ID belonging to their organization with a device ID from another organization. Since the server fails to verify if the authenticated user has the proper permissions for the target device, the request is processed. This allows an attacker to perform privileged actions such as moving a device to a different product, applying malicious firmware updates, or even triggering a denial-of-service condition on the device. In scenarios where remote console access is enabled, this unauthorized control can lead to a complete system compromise.
DailyCVE Form
Platform: nerves_hub_web
Version: 1.0.0-2.3.x
Vulnerability : Improper Authorization
Severity: Critical
date: 2026-03-10
Prediction: 2026-03-17
What Undercode Say:
Check your current nerves_hub_web version
curl -s http://your-nerves-hub-instance/api/version | jq '.version'
Verify if the fix commit (1f69c9d) is in your deployment
git ls-remote https://github.com/nerves-hub/nerves_hub_web.git refs/heads/main | grep 1f69c9d595684a4650c3ac702f3dc7c5bcd7526c
Simulate a vulnerable API request (DO NOT USE ON PRODUCTION)
This command attempts to move a target device to an attacker's product
curl -X POST http://target-nerves-hub-instance/api/devices/bulk \
-H "Authorization: Bearer $ATTACKER_TOKEN" \
-H "Content-Type: application/json" \
-d '{"device_ids": ["<TARGET_ORG_DEVICE_ID>"], "action": "move", "target_product": "<ATTACKER_PRODUCT_ID>"}'
Command to check your deployment's patch status
docker exec nerves-hub-web mix phx.server | grep "Starting NervesHubWeb"
Look for version 2.4.0 or later in the output
Exploit:
No public exploit code is currently available. To exploit this, an attacker needs valid low-privilege credentials for the platform. The attack is remote and requires the ability to intercept and modify API requests to the `/api/devices/bulk` or device update endpoints. The attacker would brute-force or guess device identifiers from other organizations and inject them into their own legitimate requests, bypassing the missing server-side authorization checks.
Protection from this CVE
Immediately upgrade `nerves_hub_web` to version 2.4.0 or later. This version contains the official fix identified by commit 1f69c9d. There are no workarounds for this vulnerability, so patching is mandatory. After patching, audit access logs for any suspicious device management actions, especially bulk operations performed by low-privileged users, and restrict API access to trusted networks where possible.
Impact
An attacker with low-level authentication can fully control devices belonging to other organizations. This can lead to:
– Malicious Firmware Updates: Attackers can push custom firmware to devices, effectively owning them.
– Data Breach: Accessing device functionality can lead to exfiltration of sensitive data.
– Service Disruption: Attackers can disable or brick devices, causing a denial of service.
– Full Device Compromise: If remote console access is enabled, attackers can gain complete interactive control over the hardware.
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Sources:
Reported By: nvd.nist.gov
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