CyberSecBulletin
CVE-2026-54318NVD status: Analyzed

core: Improper Export of Android Application Components

Published Updated By the CyberSecBulletin desk

CVE-2026-54318 is a high-severity improper export of android application components vulnerability in core from Home-assistant, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an unauthenticated attacker, without any action from a user. Affected core versions: < 2026.5.3. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.17% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Home Assistant Companion to 2026.5.3 or a later version.
  2. Read the advisory on github.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
Home-assistantcore< 2026.5.3Not stated
Home-assistantHome Assistant Companionbefore 2026.5.32026.5.3

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
ChangedThe attack can reach beyond the vulnerable component into other systems.
Confidentiality
NoneNo data is disclosed.
Integrity
HighData or code can be modified at will.
Availability
NoneAvailability is not affected.

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N. Scored by CNA (github.com).

Official description

Home Assistant is open source home automation software that puts local control and privacy first. Prior to 2026.5.3, the LocationSensorManager BroadcastReceiver is exported with no permission. Any installed app, with zero runtime permissions, can broadcast a forged Google Play Services LocationResult directly to it; the receiver trusts the extra and forwards it to the user's Home Assistant server as the device's real location. This bypasses Android's developer-mode "Mock Location" gate and allows a local malicious app to drive zone-based automations (unlock door / disarm alarm / open garage) by faking the user's GPS position. This vulnerability is fixed in 2026.5.3.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Export of Android Application Components

The Android application exports a component for use by other applications, but does not properly restrict which applications can launch the component or access the data it contains.

How developers prevent this class of flaw

  • If they do not need to be shared by other applications, explicitly mark components with android:exported=false in the application manifest.
  • If you only intend to use exported components between related apps under your control, use android:protectionLevel=signature in the xml manifest to restrict access to applications signed by you.
  • Limit Content Provider permissions (read/write) as appropriate.

More Improper Export of Android Application Components vulnerabilities (CWE-926)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Advisories

Patches and release notes

Other vulnerabilities in core

All core vulnerabilities

Recent Improper Export of Android Application Components vulnerabilities

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