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: 0.5% (37th percentile of EPSS-scored CVEs). 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: 0.5%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
5.3MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100CISA SSVC

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%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
37th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 18, 2026

Last Modified

September 8, 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
githubMentions a patch (unverified)

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 9× in last 7d / 45× 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. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-08 17:12 UTCEPSS rescore
  4. 2026-10-07 23:48 UTCEPSS rescore
  5. 2026-10-07 07:57 UTCEG score recompute
  6. 2026-10-06 15:18 UTCEPSS rescore
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  8. 2026-10-05 17:43 UTCEPSS rescore
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  10. 2026-10-03 17:36 UTCEG score recompute
  11. 2026-10-03 14:26 UTCEPSS rescore
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  14. 2026-10-01 19:50 UTCEPSS rescore
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  16. 2026-09-30 15:03 UTCEPSS rescore
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  18. 2026-09-29 15:22 UTCEPSS rescore
  19. 2026-09-29 06:59 UTCEG score recompute
  20. 2026-09-28 13:51 UTCEPSS rescore
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  22. 2026-09-27 13:48 UTCEPSS rescore
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  24. 2026-09-26 15:59 UTCEPSS rescore
  25. 2026-09-25 01:23 UTCEG score recompute
Show 63 more
  1. 2026-09-24 14:04 UTCEPSS rescore
  2. 2026-09-23 21:35 UTCEG score recompute
  3. 2026-09-23 17:54 UTCEPSS rescore
  4. 2026-09-22 22:02 UTCEG score recompute
  5. 2026-09-21 22:28 UTCEG score recompute
  6. 2026-09-20 22:54 UTCEG score recompute
  7. 2026-09-20 20:16 UTCEPSS rescore
  8. 2026-09-19 23:22 UTCEG score recompute
  9. 2026-09-18 23:49 UTCEG score recompute
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 00:15 UTCEG score recompute
  12. 2026-09-16 23:29 UTCEG score recompute
  13. 2026-09-16 14:08 UTCEPSS rescore
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-15 23:56 UTCEG score recompute
  16. 2026-09-13 23:22 UTCEG score recompute
  17. 2026-09-13 16:47 UTCEPSS rescore
  18. 2026-09-12 23:50 UTCEG score recompute
  19. 2026-09-12 00:16 UTCEG score recompute
  20. 2026-09-11 14:53 UTCEPSS rescore
  21. 2026-09-11 00:39 UTCEG score recompute
  22. 2026-09-10 09:35 UTCEPSS rescore
  23. 2026-09-10 01:06 UTCEG score recompute
  24. 2026-09-08 22:01 UTCEPSS rescore
  25. 2026-09-07 07:04 UTCEG score recompute
  26. 2026-09-06 13:47 UTCEPSS rescore
  27. 2026-09-06 07:25 UTCEG score recompute
  28. 2026-09-05 07:49 UTCEG score recompute
  29. 2026-09-04 08:16 UTCEG score recompute
  30. 2026-09-04 05:06 UTCEPSS rescore
  31. 2026-09-03 08:38 UTCEG score recompute
  32. 2026-09-02 14:12 UTCEPSS rescore
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  34. 2026-09-01 13:54 UTCEPSS rescore
  35. 2026-09-01 09:25 UTCEG score recompute
  36. 2026-09-01 04:40 UTCEPSS rescore
  37. 2026-08-31 09:29 UTCEG score recompute
  38. 2026-08-30 19:17 UTCEPSS rescore
  39. 2026-08-30 09:40 UTCEG score recompute
  40. 2026-08-30 01:22 UTCEPSS rescore
  41. 2026-08-29 10:04 UTCEG score recompute
  42. 2026-08-28 21:41 UTCEPSS rescore
  43. 2026-08-28 10:31 UTCEG score recompute
  44. 2026-08-27 14:25 UTCEPSS rescore
  45. 2026-08-27 10:56 UTCEG score recompute
  46. 2026-08-26 14:46 UTCEPSS rescore
  47. 2026-08-26 11:22 UTCEG score recompute
  48. 2026-08-25 13:49 UTCEPSS rescore
  49. 2026-08-25 11:47 UTCEG score recompute
  50. 2026-08-24 12:12 UTCEG score recompute
  51. 2026-08-23 12:39 UTCEG score recompute
  52. 2026-08-23 00:19 UTCEPSS rescore
  53. 2026-08-22 13:06 UTCEG score recompute
  54. 2026-08-21 23:49 UTCEPSS rescore
  55. 2026-08-21 13:34 UTCEG score recompute
  56. 2026-08-20 22:55 UTCEPSS rescore
  57. 2026-08-20 14:00 UTCEG score recompute
  58. 2026-08-19 17:04 UTCEPSS rescore
  59. 2026-08-19 14:27 UTCEG score recompute
  60. 2026-08-19 13:59 UTCEG score recompute
  61. 2026-08-18 21:36 UTCEG score recompute
  62. 2026-08-18 20:58 UTCEG score recompute
  63. 2026-08-18 20:58 UTCMITRE cvelistV5first tracked

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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 on August 18, 2026, with the most recent update on September 8, 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 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53458?
CVE-2026-53458 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-53458?
A fix for CVE-2026-53458 is available: update to the fixed version the vendor names in its advisory.

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