Vulnerability · Published Aug 18, 2026 · Assigned by GitHub_M

CVE-2026-53458Blueprint Studio API exposed internal exception details

Medium 5.3

In plain English

A medium-severity security flaw in blueprint-studio from ha-china. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 39% of all known vulnerabilities).

Severity (CVSS 4.0)5.3Medium

Exploit odds (30 days)0.5%top 60.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Blueprint Studio is a VS Code-like file editor for Home Assistant configuration files. Prior to 2.5.2, Blueprint Studio backend API handlers in custom_components/blueprint_studio/backend/api.py returned raw exception strings to authenticated Home Assistant users. Some exception messages could contain internal filesystem paths or implementation details. The disclosed information could help an authenticated user fingerprint a Home Assistant installation and refine follow-up attacks. This issue is fixed in version 2.5.2.

Affected products (as reported)

Vendor	Product	Versions
ha-china	blueprint-studio	< 2.5.2

Weakness: CWE-209 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

References

https://github.com/ha-china/blueprint-studio/security/advisories/GHSA-6vc4-5wqj-fm6p x_refsource_CONFIRM
https://github.com/ha-china/blueprint-studio/commit/943aed0be67f3a910b0f70a3864288d5e17e55ce x_refsource_MISC
https://github.com/ha-china/blueprint-studio/releases/tag/v2.5.2 x_refsource_MISC