# Improper authorization in device bulk actions and device update API allows cross-organization device control

CVE record · `CVE-2026-28806`

- **Identifiers:** `CVE-2026-28806`
- **State:** Confirmed
- **Severity:** CVSS 9.4 Critical
- **Critical:** Yes: CVSS 9+
- **CNA:** EEF
- **Weakness (CWE):** [CWE-285](https://cwe.mitre.org/data/definitions/285.html) · [CWE-668](https://cwe.mitre.org/data/definitions/668.html)
- **Tags:** [Broken access control](https://agentprime.io/advisories/tag/access-control.md) · [Information disclosure](https://agentprime.io/advisories/tag/info-disclosure.md)
- **Technologies:** [nerves-hub nerves_hub_web](https://agentprime.io/advisories/technology/nerves-hub-nerves-hub-web.md)
- **Published:** 10 Mar 2026
- **Updated:** 11 Nov 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: EEF) at 10 Mar 2026, 21:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Critical

Critical, because:

- CVSS score 9.4: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: nerves-hub. Product: nerves_hub_web.
  - affected: `1.0.0 to before 2.4.0` (semver)
  - Other versions: unaffected
  - Package name: `nerves_hub`
  - purl: `pkg:otp/nerves_hub?repository_url=https:%2F%2Fgithub.com%2Fnerves-hub%2Fnerves_hub_web&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Fnerves-hub%2Fnerves_hub_web.git`
- Vendor: nerves-hub. Product: nerves_hub_web.
  - affected: `1.0.0 to before 2.4.0` (other)
  - Other versions: unaffected
  - Package name: `nerves-hub/nerves-hub`
  - Collection: `https://ghcr.io`
  - purl: `pkg:oci/nerves-hub?repository_url=ghcr.io%2Fnerves-hub%2Fnerves-hub`
- Vendor: nerves-hub. Product: nerves_hub_web.
  - affected: `adaeefdb7a835525482588f43332ef988cc448c7 to before *` (git)
  - affected: `79743ef08f7f801617b653fd09f37c01ed9b4be0 to before 1f69c9d595684a4650c3ac702f3dc7c5bcd7526c` (git)
  - Other versions: unaffected
  - Package name: `nerves-hub/nerves_hub_web`
  - Collection: `https://github.com`
  - purl: `pkg:github/nerves-hub/nerves_hub_web`

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 9.4 Critical, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`, from CNA (EEF)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0048, the 42nd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 10 Mar 2026, 21:30 UTC: [Confirmed by the CVE List](https://www.cve.org/CVERecord?id=CVE-2026-28806)
- 10 Mar 2026, 22:16 UTC: [Confirmed by NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-28806)

## Sources

- [CVE List: CVE-2026-28806](https://www.cve.org/CVERecord?id=CVE-2026-28806)
- [NVD: CVE-2026-28806](https://nvd.nist.gov/vuln/detail/CVE-2026-28806)

### References from the CNA

- <https://github.com/nerves-hub/nerves_hub_web/security/advisories/GHSA-f8fr-mccc-xvcx> (vendor-advisory, related)
- <https://cna.erlef.org/cves/CVE-2026-28806.html> (related)
- <https://osv.dev/vulnerability/EEF-CVE-2026-28806> (related)
- <https://github.com/nerves-hub/nerves_hub_web/commit/adaeefdb7a835525482588f43332ef988cc448c7> (related)
- <https://github.com/nerves-hub/nerves_hub_web/commit/79743ef08f7f801617b653fd09f37c01ed9b4be0> (related)
- <https://github.com/nerves-hub/nerves_hub_web/commit/1f69c9d595684a4650c3ac702f3dc7c5bcd7526c> (patch)

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-28806>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-28806/>. Everything for agents: <https://agentprime.io/llms.txt>.