CVE-2026-55844 Information disclosure in core
The Home Assistant iOS app may leak access tokens and sensor data by incorrectly using internal URLs on untrusted networks, requiring an upgrade to fix.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-55844?
CVE-2026-55844 is a high-severity vulnerability in home-assistant core, published on 29 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-319
Which versions are affected by CVE-2026-55844?
How do I fix CVE-2026-55844?
No fix has been published for CVE-2026-55844 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-55844 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55844 exists.
Sources
Also known as GHSA-cm5v-547m-qh5h.