# 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.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Jun 2026
- **Updated:** 30 Jun 2026
- **Also known as:** GHSA-cm5v-547m-qh5h

## 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 (Cleartext Transmission of Sensitive Information)

## 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.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-55844 and fix it if it is affected.

What it is: 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55844 exists.

Affected product: home-assistant core. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-55844/ (Markdown: https://insights.sbomify.com/CVE-2026-55844/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-55844
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-55844
- OSV: https://osv.dev/vulnerability/CVE-2026-55844

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-55844/
Summaries are generated and may contain mistakes; the official description above is the record.