CVE-2026-53457Network attack vectorHinoki check available

Administrator path traversal via unbounded terminal cwd

Published Aug 18, 2026 · Updated Aug 19, 2026

Path traversal in Home Assistant China Blueprint Studio before 2.5.2 allows remote authenticated users to access unintended host paths via cwd. In custom_components/blueprint_studio/backend/terminal_manager.py, the legacy terminal command path accepted a caller-supplied working directory, verified only that it existed, and then ran commands from that location without first confining it to the Home Assistant configuration directory. Reachability is limited to the restricted terminal helper and requires administrator-level access; resulting file read or write access is bounded by the Home Assistant container and underlying filesystem permissions.

CVSS severity5.1
Medium
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Path traversal in Home Assistant China Blueprint Studio before 2.5.2 allows remote authenticated users to access unintended host paths via cwd. In custom_components/blueprint_studio/backend/terminal_manager.py, the legacy terminal command path accepted a caller-supplied working directory, verified only that it existed, and then ran commands from that location without first confining it to the Home Assistant configuration directory. Reachability is limited to the restricted terminal helper and requires administrator-level access; resulting file read or write access is bounded by the Home Assistant container and underlying filesystem permissions.

The record

CVE
CVE-2026-53457
Published
Aug 18, 2026
Updated
Aug 19, 2026
Vendor
Home Assistant China
Product
Blueprint Studio
Classifications
CWE-22
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Home Assistant China · Blueprint Studioversion=< 2.5.2

Published CVSS scores

5.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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