Vulnerability · Published Oct 28, 2026 · Assigned by GitHub_M
CVE-2026-59177ESPHome Device Builder allows unauthenticated dashboard access via the HA add-on ingress site bound to all interfaces
High 8.8
In plain English
A high-severity security flaw in device-builder from esphome. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 68% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei. Fixed versions are available - upgrade the affected package.
Official description
ESPHome Device Builder Dashboard is a dashboard for the ESPHome home management software. Prior to 1.0.10, the `Home Assistant` add-on's trusted `ingress` site binds to `0.0.0.0` while intentionally skipping dashboard authentication because the supervisor is expected to authenticate requests upstream. Host networking, required for mDNS, also binds this no-auth site to the `Home Assistant` host's LAN interface. Any device on that local network can therefore connect directly to the `ingress` port, bypass the supervisor, and obtain the full dashboard without credentials or operator misconfiguration. Dashboard capability includes compile-time Python execution through `external_components:`, shell execution through compile and validation subprocesses, and arbitrary access to configuration and data files, compromising the mounted `Home Assistant` configuration and managed ESPHome devices. The standalone Docker dashboard and the password-gated public port 6052 are not affected. This issue is fixed in version 1.0.10.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | esphome-device-builder | 1.0.10 | GHSA-vv4j-m4vr-f3g6 |
| PyPI | esphome-device-builder | 1.0.10 | PYSEC-2026-3834 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| esphome | device-builder | < 1.0.10 |
Weakness: CWE-1327 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/esphome/device-builder/security/advisories/GHSA-vv4j-m4vr-f3g6 x_refsource_CONFIRM
- https://github.com/esphome/device-builder/pull/1565 x_refsource_MISC
- https://github.com/esphome/device-builder/commit/b6387db3f8bf1d3df5771f40e9856b959ae4f6a1 x_refsource_MISC
- https://github.com/esphome/device-builder/releases/tag/1.0.10 x_refsource_MISC