CVE-2026-40602

MEDIUMNVD 5.65.6
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.6 under NVD CVSS v3. EPSS exploit probability: 0.1% (3rd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Trending — 3 sources updated this week
5.6EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.6Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

The Home Assistant Command-line interface (hass-cli) is a command-line tool for Home Assistant. Up to 1.0.0 of home-assitant-cli an unrestricted environment was used to handle Jninja2 templates instead of a sandboxed one. The user-supplied input within Jinja2 templates was rendered locally with no restrictions. This gave users access to Python's internals and extended the scope of templating beyond the intended usage. This vulnerability is fixed in 1.0.0.

CVSS v3
5.6
EG Score
5.6MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

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)
Severity56% × 45%
The EG Score, 5.6 of 10.
Exploitation0.1% × 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
0.1%
EPSS %ILE
3rd
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

April 21, 2026

Last Modified

April 27, 2026

Advisory Details (2)

Auto-updated Aug 2, 2026
Patch available. Sources: github_pr, github.
GitHub advisoryMentions a patch (unverified)

Handling of user-supplied Jinja2 templates · Advisory · home-assistant-ecosystem/home-assistant-cli · GitHub

https://github.com/home-assistant-ecosystem/home-assistant-cli/security/advisories/GHSA-33qf-q99x-wpm8
GitHub pull request Patch Available

Migrate to ImmutableSandboxedEnvironment

Patch available: home-assistant-ecosystem/home-assistant-cli 1.0.0 (PR #453 merged 2026-04-12)

https://github.com/home-assistant-ecosystem/home-assistant-cli/pull/453

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
homeassistant-cli0.0.1 ... 0.9.6 (41 versions)
  • every version up to 1.0.0: fixed in 1.0.0
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 27× 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.

Showing the most recent 96 of 163 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 4 repeat rows among the latest 100 are merged into the row they repeat. The 67 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  5. 2026-10-12 16:09 UTCEG score recompute
  6. 2026-10-11 19:51 UTCEG score recompute
  7. 2026-10-11 17:05 UTCEG score recompute
  8. 2026-10-11 14:31 UTCEG score recompute
  9. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-10-10 18:25 UTCOSV refresh
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  13. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  15. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  18. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-09-21 05:49 UTCOSV refresh
  25. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 1st percentile
Show 71 more
  1. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  4. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  9. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  10. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  12. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-09-02 03:09 UTCOSV refresh
  16. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  17. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  22. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  23. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  25. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  26. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  27. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  28. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  29. 2026-08-16 06:17 UTCEG score recompute
  30. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  31. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  32. 2026-08-14 04:28 UTCEG score recompute
  33. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  34. 2026-08-12 22:52 UTCEG score recompute
  35. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  36. 2026-08-12 00:39 UTCEG score recompute
  37. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  38. 2026-08-11 02:26 UTCEG score recompute
  39. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  40. 2026-08-10 01:55 UTCEG score recompute
  41. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  42. 2026-08-09 03:41 UTCEG score recompute
  43. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  44. 2026-08-07 19:38 UTCEG score recompute
  45. 2026-08-06 21:24 UTCEG score recompute
  46. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  47. 2026-08-05 23:10 UTCEG score recompute
  48. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  49. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  50. 2026-08-03 21:23 UTCEG score recompute
  51. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  52. 2026-08-02 12:45 UTCEG score recompute
  53. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  54. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  55. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  56. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  57. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  58. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  59. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  60. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  61. 2026-07-23 03:11 UTCEG score recompute
  62. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  63. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  64. 2026-07-20 17:08 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  65. 2026-07-20 05:16 UTCOSV refresh
  66. 2026-07-19 14:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  67. 2026-07-18 10:04 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  68. 2026-07-16 17:03 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  69. 2026-07-15 16:57 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  70. 2026-07-15 02:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  71. 2026-07-13 22:30 UTCEPSS rescoreEPSS 0.1% · 1st percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-40602?
CVE-2026-40602 is a medium-severity vulnerability; its CVE record was published on April 21, 2026. The Home Assistant Command-line interface (hass-cli) is a command-line tool for Home Assistant. Up to 1.0.0 of home-assitant-cli an unrestricted environment was used to handle Jninja2 templates instead of a sandboxed one. The user-supplied input within Jinja2 templates was rendered locally with no…
When was the CVE record for CVE-2026-40602 published?
The CVE record for CVE-2026-40602 was published on April 21, 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 April 27, 2026; the record at its source may have been updated since.
Is CVE-2026-40602 actively exploited?
CVE-2026-40602 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-40602?
CVE-2026-40602 has a CVSS v3 base score of 5.6 (NVD).
How do I remediate CVE-2026-40602?
A fix for CVE-2026-40602 is available: update to the fixed version the vendor names in its advisory.

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