CVE-2026-120286: medium-severity vulnerability in nerves-hub nerves_hub_web
Missing authorization in device and deployment group page events allows view-role members to change devices and deployment groups
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.2%
Missing Authorization vulnerability in the device and deployment group pages in nerves-hub nerves_hub_web allows an authenticated organization member with the view role to change devices and deployment groups via LiveView events reserved for the manage role. The event handlers that add and delete device certificates, add and remove tags, overwrite or clear a device's manual location, remove a device from its deployment group, move matched devices into a deployment group or remove unmatched ones, import devices from a CSV, and start, retry or delete firmware delta builds carry out the change without calling authorized!/2, and the pages render the controls to every member.
A view member can add a certificate that lets whoever holds its key connect as the device, delete a certificate so the device can no longer authenticate with it, and change which deployment group, and so which firmware release, a device receives. Everything stays within the organizations the member belongs to.
This issue affects nerves_hub: from 1.0.0 before 2.5.3.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:L/SA:N
Affected products
nerves-hub · nerves_hub_webRelated CVEs — nerves-hub nerves_hub_web
In the same product, most dangerous first.
CVE-2026-119446CRITICALSession fixation in the CLI login flow allows an unauthenticated attacker to obtain a user's API tokenEPSS 0.5%CVE-2025-64097CRITICALNervesHub has Insufficient Token Entropy that Allows Authentication Bypass via Brute ForceEPSS 0.5%CVE-2026-28806CRITICALImproper authorization in device bulk actions and device update API allows cross-organization device controlEPSS 0.5%CVE-2026-120730HIGHMass assignment of organization, product and deployment group IDs allows users to write into other organizations and receive their firmwareEPSS 0.4%CVE-2026-120997LOWImproper session invalidation keeps removed or demoted members' open pages and device consoles working at their old roleEPSS 0.3%CVE-2026-120295HIGHIncorrect authorization in the devices page bulk move allows view-role members to move devices into another organization and receive its firmwareEPSS 0.2%
References
https://cna.erlef.org/cves/CVE-2026-120286.htmlhttps://github.com/nerves-hub/nerves_hub_web/commit/34ea112472a460319c1e1dec8ad0ffc37df05ffehttps://github.com/nerves-hub/nerves_hub_web/commit/7b511764a468bb2c1f33945874faa86af2255c0chttps://github.com/nerves-hub/nerves_hub_web/security/advisories/GHSA-gxj7-m8x6-r644https://osv.dev/vulnerability/EEF-CVE-2026-120286