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Fencer Vulns
critical 10.0

CVE-2023-27482 in the critical feed json

homeassistant is an open source home automation tool.

published 2023-03-08 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-31251

cvss
10.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
72.2%
EPSS 72.2% chance of exploitation in 30 days, percentile 99.4%
public exploits
0
none known, plus a Nuclei check

Summary

homeassistant is an open source home automation tool. A remotely exploitable vulnerability bypassing authentication for accessing the Supervisor API through Home Assistant has been discovered. This impacts all Home Assistant installation types that use the Supervisor 2023.01.1 or older. Installation types, like Home Assistant Container (for example Docker), or Home Assistant Core manually in a Python environment, are not affected. The issue has been mitigated and closed in Supervisor version 2023.03.1, which has been rolled out to all affected installations via the auto-update feature of the Supervisor. This rollout has been completed at the time of publication of this advisory. Home Assistant Core 2023.3.0 included mitigation for this vulnerability. Upgrading to at least that version is thus advised. In case one is not able to upgrade the Home Assistant Supervisor or the Home Assistant Core application at this time, it is advised to not expose your Home Assistant instance to the internet.

Patch / fix

  • home-assistant home-assistant 2023.3.0
  • home-assistant supervisor 2023.03.1

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
20 mo ago

Exploit prediction

72.17% chance of exploitation in the next 30 days, higher than 99.4% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template Home Assistant Supervisor - Authentication Bypass nuclei detection template

CVSS scores

assigned by version score vector
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

  • home-assistant core
  • home-assistant supervisor

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.