Security readout for executives and security teams
Plain-English summary
CVE-2026-28806 lets an authenticated NervesHub user control devices outside their organization through missing authorization checks. In a multi-tenant device-management environment, this can disrupt connectivity, interfere with firmware management, and, where remote console features are enabled, may contribute to full device compromise.
Executive priority
Treat this as urgent for any NervesHub environment managing production or customer devices. The issue can cross organizational boundaries and affect device integrity, availability, and confidentiality, so remediation should be prioritized ahead of routine maintenance.
Technical view
nerves_hub_web versions from 1.0.0 before 2.4.0 lack proper authorization in device bulk action and device update API endpoints. Authenticated users can manipulate device identifiers to target devices from other organizations and perform management actions beyond their privileges.
Likely exposure
Exposure is likely for self-hosted or managed NervesHub deployments running nerves_hub_web before 2.4.0, especially where multiple organizations share the platform or remote console capabilities are enabled.
Exploitation context
The source bundle does not show active exploitation or KEV listing. Exploitation requires authenticated access, but no user interaction and low complexity are reported. The business risk is cross-tenant device control rather than public unauthenticated takeover.
Researcher notes
Focus review on authorization boundaries in device bulk actions and device update handlers. Validate that device identifiers are constrained to the authenticated user’s organization before management actions execute. Do not assume exploitation beyond what the sources state.
Mitigation direction
- Upgrade nerves_hub_web to version 2.4.0 or later.
- Apply the referenced patch if maintaining a fork.
- Review the GitHub advisory for vendor-specific deployment guidance.
- Restrict management access while remediation is underway.
Validation and detection
- Inventory nerves_hub_web deployments and versions.
- Flag versions from 1.0.0 before 2.4.0 as affected.
- Confirm bulk action APIs enforce organization-scoped device authorization.
- Review logs for cross-organization device targeting attempts.
- Identify deployments with remote console features enabled.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-285: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-668: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-28806 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.4 (4.0)
- Known Exploited
- No
- Published
Vector: 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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
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——EEFVulnerability scoring details
Base CVSS 4.0 score
9.4CriticalVector: 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
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/nerves-hub/nerves_hub_web/security/advisories/GHSA-f8fr-mccc-xvcxCVE reference, EEF · vendor-advisory, related
- https://cna.erlef.org/cves/CVE-2026-28806.htmlCVE reference, EEF · related
- https://osv.dev/vulnerability/EEF-CVE-2026-28806CVE reference, EEF · related
- https://github.com/nerves-hub/nerves_hub_web/commit/1f69c9d595684a4650c3ac702f3dc7c5bcd7526cCVE reference, EEF · patch
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Exposure of Resource to Wrong Sphere
Exposure of Resource to Wrong Sphere represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.