CVE-2026-34205 | home-assistant up to 17.1 Internal Docker Bridge Interface communication channel to intended endpoints (GHSA-gh5m-4m97-c95h)

VDB-354056 · CVE-2026-34205 · GHSA-GH5M-4M97-C95H HOME-ASSISTANT UP TO 17.1 INTERNAL DOCKER BRIDGE INTERFACE COMMUNICATION CHANNEL TO INTENDED ENDPOINTS HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.9 $0-$5k 5.70- 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. Productinfo Name home-assistant Version 17.0 17.1 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 Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock 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 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock 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: 99:75C:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸