CVE-2026-53458

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 74% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

August 18, 2026

Last Modified

August 19, 2026

Advisory Details (3)

Auto-updated Aug 18, 2026
Patch available. Sources: github_release, github, github_commit.
github_release Patch Available

Blueprint Studio 2.5.2: Security Hardening and File Explorer Improvements

Patch available: ha-china/blueprint-studio v2.5.2

https://github.com/ha-china/blueprint-studio/releases/tag/v2.5.2
github_commit Patch Available

commit 943aed0be67f (ha-china/blueprint-studio)

Patch available: ha-china/blueprint-studio v2.5.2 (contains commit 943aed0be67f)

https://github.com/ha-china/blueprint-studio/commit/943aed0be67f3a910b0f70a3864288d5e17e55ce
github Patch Available

Blueprint Studio API exposed internal exception details · Advisory · ha-china/blueprint-studio · GitHub

Affected: v2.5.2 by logging detailed exceptions server-side while returning generic API err

https://github.com/ha-china/blueprint-studio/security/advisories/GHSA-6vc4-5wqj-fm6p

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 18× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-26 14:46 UTCEPSS rescore
  2. 2026-08-26 11:22 UTCEG score recompute
  3. 2026-08-25 13:49 UTCEPSS rescore
  4. 2026-08-25 11:47 UTCEG score recompute
  5. 2026-08-24 12:12 UTCEG score recompute
  6. 2026-08-23 12:39 UTCEG score recompute
  7. 2026-08-23 00:19 UTCEPSS rescore
  8. 2026-08-22 13:06 UTCEG score recompute
  9. 2026-08-21 23:49 UTCEPSS rescore
  10. 2026-08-21 13:34 UTCEG score recompute
  11. 2026-08-20 22:55 UTCEPSS rescore
  12. 2026-08-20 14:00 UTCEG score recompute
  13. 2026-08-19 17:04 UTCEPSS rescore
  14. 2026-08-19 14:27 UTCEG score recompute
  15. 2026-08-19 13:59 UTCEG score recompute
  16. 2026-08-18 21:36 UTCEG score recompute
  17. 2026-08-18 20:58 UTCEG score recompute
  18. 2026-08-18 20:58 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-53458?
CVE-2026-53458 is a medium vulnerability published on August 18, 2026. 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 customcomponents/blueprintstudio/backend/api.py returned raw exception strings to authenticated Home Assistant users. Some exception messages could contain…
When was CVE-2026-53458 disclosed?
CVE-2026-53458 was first published in the National Vulnerability Database on August 18, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53458 actively exploited?
CVE-2026-53458 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 73.5% of all scored CVEs.
What is the CVSS score of CVE-2026-53458?
CVE-2026-53458 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-53458?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53458, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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