home-assistant up to 17.1 Internal Docker Bridge Interface communication channel to intended endpoints

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.9$0-$5k1.15

Summaryinfo

A vulnerability labeled as critical has been found in home-assistant up to 17.1. Affected is an unknown function of the component Internal Docker Bridge Interface. Such manipulation leads to communication channel to intended endpoints. This vulnerability is documented as CVE-2026-34205. The attack requires being on the local network. There is not any exploit available.

Detailsinfo

A vulnerability was found in home-assistant up to 17.1 and classified as critical. Affected by this issue is an unknown part of the component Internal Docker Bridge Interface. The manipulation with an unknown input leads to a communication channel to intended endpoints vulnerability. Using CWE to declare the problem leads to CWE-923. The product establishes a communication channel to (or from) an endpoint for privileged or protected operations, but it does not properly ensure that it is communicating with the correct endpoint. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Home Assistant is open source home automation software that puts local control and privacy first. Home Assistant apps (formerly add-ons) configured with host network mode expose unauthenticated endpoints bound to the internal Docker bridge interface to the local network. On Linux, this configuration does not restrict access to the app as intended, allowing any device on the same network to reach these endpoints without authentication. Home Assistant Supervisor 2026.03.02 addresses the issue.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-34205 since 03/26/2026. The exploitation is known to be easy. The attack needs to be done within the local network. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/27/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.6
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Communication channel to intended endpoints
CWE: CWE-923
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/26/2026 CVE reserved
03/27/2026 +1 days Advisory disclosed
03/27/2026 +0 days VulDB entry created
03/27/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-gh5m-4m97-c95h
Status: Confirmed

CVE: CVE-2026-34205 (🔒)
GCVE (CVE): GCVE-0-2026-34205
GCVE (VulDB): GCVE-100-354056

Entryinfo

Created: 03/27/2026 23:52
Changes: 03/27/2026 23:52 (61)
Complete: 🔍
Cache ID: 216:9EF:103

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