CVE-2026-53453

HIGHPre-NVD 8.78.7
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (37th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
8.7EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.7Exploit: 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 exposed administrator-intended backend API actions to any authenticated Home Assistant user because the backend did not consistently enforce the panel's admin-only authorization boundary. Affected surfaces included the backend API, upload API, stream routes, terminal WebSocket, Blueprint Studio WebSocket subscriptions, call_service, render_template, global_replace, file and stream access paths, upload handling, and terminal helpers. A non-admin user could invoke arbitrary Home Assistant services, expose Home Assistant state through templates, modify configuration files, access streamed or downloaded configuration content, upload files, or reach terminal-related helpers. These actions could compromise the confidentiality, integrity, and availability of the Home Assistant installation. This issue is fixed in version 2.5.2.

CVSS v3
8.7
EG Score
8.7HIGHmedium confidence
EG Risk
39
EG Risk 39/100

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 (value × EchelonGraph’s weight)
Severity87% × 45%
The EG Score, 8.7 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
37th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 18, 2026

Last Modified

September 8, 2026

Advisory Details (3)

Auto-updated Aug 18, 2026
Patch available. Sources: github, github_commit, github_release.
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 advisoryMentions a patch (unverified)

Blueprint Studio API authorization bypass for non-admin Home Assistant users · Advisory · ha-china/blueprint-studio · GitHub

Affected: v2.5.2 by requiring Home Assistant authentication plus administrator privileges o

https://github.com/ha-china/blueprint-studio/security/advisories/GHSA-ppwq-ch6x-936g

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 50× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  4. 2026-10-12 15:57 UTCEG score recompute
  5. 2026-10-11 19:40 UTCEG score recompute
  6. 2026-10-11 16:55 UTCEG score recompute
  7. 2026-10-11 14:19 UTCEG score recompute
  8. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  11. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  13. 2026-10-06 21:38 UTCEG score recompute
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  15. 2026-10-06 08:20 UTCEG score recompute
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  17. 2026-10-05 11:41 UTCEG score recompute
  18. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  19. 2026-10-03 17:36 UTCEG score recompute
  20. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  22. 2026-10-02 01:25 UTCEG score recompute
  23. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  24. 2026-09-30 22:34 UTCEG score recompute
  25. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 36th percentile
Show 73 more
  1. 2026-09-30 09:46 UTCEG score recompute
  2. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  3. 2026-09-28 23:28 UTCEG score recompute
  4. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  5. 2026-09-27 21:11 UTCEG score recompute
  6. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  7. 2026-09-27 07:54 UTCEG score recompute
  8. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  9. 2026-09-25 01:23 UTCEG score recompute
  10. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  11. 2026-09-23 21:51 UTCEG score recompute
  12. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  13. 2026-09-22 20:24 UTCEG score recompute
  14. 2026-09-22 07:29 UTCEG score recompute
  15. 2026-09-21 06:02 UTCEG score recompute
  16. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  17. 2026-09-20 03:23 UTCEG score recompute
  18. 2026-09-19 01:54 UTCEG score recompute
  19. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  20. 2026-09-18 00:27 UTCEG score recompute
  21. 2026-09-16 22:58 UTCEG score recompute
  22. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  23. 2026-09-16 10:08 UTCEG score recompute
  24. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  25. 2026-09-15 08:27 UTCEG score recompute
  26. 2026-09-13 18:15 UTCEG score recompute
  27. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  28. 2026-09-12 16:48 UTCEG score recompute
  29. 2026-09-11 15:20 UTCEG score recompute
  30. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  31. 2026-09-10 13:50 UTCEG score recompute
  32. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  33. 2026-09-09 09:58 UTCEG score recompute
  34. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  35. 2026-09-07 23:09 UTCEG score recompute
  36. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  37. 2026-09-06 18:38 UTCEG score recompute
  38. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  39. 2026-09-05 17:11 UTCEG score recompute
  40. 2026-09-04 15:40 UTCEG score recompute
  41. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  42. 2026-09-03 00:56 UTCEG score recompute
  43. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  44. 2026-09-01 23:22 UTCEG score recompute
  45. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  46. 2026-09-01 10:38 UTCEG score recompute
  47. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  48. 2026-08-30 19:52 UTCEG score recompute
  49. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  50. 2026-08-30 07:08 UTCEG score recompute
  51. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  52. 2026-08-29 03:51 UTCEG score recompute
  53. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  54. 2026-08-28 02:15 UTCEG score recompute
  55. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  56. 2026-08-27 00:44 UTCEG score recompute
  57. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  58. 2026-08-25 23:16 UTCEG score recompute
  59. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  60. 2026-08-24 21:49 UTCEG score recompute
  61. 2026-08-23 07:37 UTCEG score recompute
  62. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  63. 2026-08-22 06:10 UTCEG score recompute
  64. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  65. 2026-08-21 04:41 UTCEG score recompute
  66. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  67. 2026-08-20 03:14 UTCEG score recompute
  68. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  69. 2026-08-19 14:27 UTCEG score recompute
  70. 2026-08-19 13:40 UTCEG score recompute
  71. 2026-08-18 21:36 UTCEG score recompute
  72. 2026-08-18 20:58 UTCEG score recomputeFirst assessed: 8.7 HIGH
  73. 2026-08-18 20:58 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-53453?
CVE-2026-53453 is a high-severity vulnerability; its CVE record was 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 exposed administrator-intended backend API actions to any authenticated Home Assistant user because the backend did not consistently enforce the panel's admin-only authorization…
When was the CVE record for CVE-2026-53453 published?
The CVE record for CVE-2026-53453 was published on August 18, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 8, 2026; the record at its source may have been updated since.
Is CVE-2026-53453 actively exploited?
CVE-2026-53453 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53453?
CVE-2026-53453 has a CVSS base score of 8.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-53453?
A fix for CVE-2026-53453 is available: update to the fixed version the vendor names in its advisory.

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