Vulnerability · Published Jun 29, 2026 · Assigned by GitHub_M

CVE-2026-55844Home Assistant: iOS Companion App ignores internal SSID allowlist for connections – possible leak of access token and sensor data

High 7.5

In plain English

A high-severity security flaw in core from home-assistant. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.2%top 90.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Home Assistant is open source home automation software that puts local control and privacy first. Prior to 2025.5.0, The iOS companion app ignores the SSID allowlist for internal networks. The app uses SSID to detect when to use the internal URL, but whenever the app cannot find any other URL to be used, it fallbacks to the internal URL as well, which can expose user's token when connected to a not secure network. This vulnerability is fixed in 2025.5.0.

Affected products (as reported)

Vendor	Product	Versions
home-assistant	core	< 2025.5.0

Weakness: CWE-319 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/home-assistant/core/security/advisories/GHSA-cm5v-547m-qh5h x_refsource_CONFIRM