CVE-2026-71259

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

Score 8.6 from GitHub Security Advisory (severity: HIGH) published 2026-08-05. a secondary CVSS source baseline 8.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.6Exploit: None knownExposed: 0

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

ESPHome through 2026.7.0-dev contains an operator-precedence bug in the cv.url validator in esphome/config_validation.py. Because binds tighter than , any file: URI passes validation regardless of netloc. This validator gates the field of the external_components YAML directive's git source schema, which is passed to (git supports file:// natively).

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity86% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

August 5, 2026

Last Modified

August 26, 2026

Advisory Details (2)

Auto-updated Aug 5, 2026
No patch confirmed yet.
generic

esphome/esphome/config_validation.py at dev · esphome/esphome · GitHub

https://github.com/esphome/esphome/blob/dev/esphome/config_validation.py
generic

GitHub - esphome/esphome: ESPHome is a system to control your ESP32, ESP8266, BK72xx, RP2040 by simple yet powerful configuration files and control them remotely through Home Automation systems. · GitHub

https://github.com/esphome/esphome

Vendor Advisories for CVE-2026-71259(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 93× 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.

Showing the most recent 100 of 158 total refreshes for this CVE.

  1. 2026-09-19 07:49 UTCEG score recompute
  2. 2026-09-19 07:49 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 17:43 UTCGHSA enrichment
  5. 2026-09-18 03:56 UTCEG score recompute
  6. 2026-09-18 03:56 UTCGHSA enrichment
  7. 2026-09-17 15:57 UTCGHSA enrichment
  8. 2026-09-17 01:07 UTCEG score recompute
  9. 2026-09-17 01:07 UTCGHSA enrichment
  10. 2026-09-16 14:08 UTCEPSS rescore
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-16 05:14 UTCGHSA enrichment
  13. 2026-09-15 16:24 UTCEG score recompute
  14. 2026-09-15 16:24 UTCGHSA enrichment
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-15 01:30 UTCGHSA enrichment
  17. 2026-09-14 07:28 UTCGHSA enrichment
  18. 2026-09-13 19:30 UTCEG score recompute
  19. 2026-09-13 19:30 UTCGHSA enrichment
  20. 2026-09-13 07:13 UTCGHSA enrichment
  21. 2026-09-12 19:15 UTCEG score recompute
  22. 2026-09-12 19:15 UTCGHSA enrichment
  23. 2026-09-12 15:02 UTCEPSS rescore
  24. 2026-09-12 07:16 UTCGHSA enrichment
  25. 2026-09-11 19:17 UTCEG score recompute
Show 75 more
  1. 2026-09-11 19:17 UTCGHSA enrichment
  2. 2026-09-11 14:53 UTCEPSS rescore
  3. 2026-09-11 07:13 UTCGHSA enrichment
  4. 2026-09-10 19:15 UTCEG score recompute
  5. 2026-09-10 19:14 UTCGHSA enrichment
  6. 2026-09-10 09:35 UTCEPSS rescore
  7. 2026-09-10 07:14 UTCGHSA enrichment
  8. 2026-09-09 19:15 UTCGHSA enrichment
  9. 2026-09-09 06:25 UTCEG score recompute
  10. 2026-09-09 06:24 UTCGHSA enrichment
  11. 2026-09-08 22:01 UTCEPSS rescore
  12. 2026-09-08 08:00 UTCGHSA enrichment
  13. 2026-09-07 18:19 UTCEG score recompute
  14. 2026-09-07 18:19 UTCGHSA enrichment
  15. 2026-09-06 18:24 UTCEG score recompute
  16. 2026-09-06 18:24 UTCGHSA enrichment
  17. 2026-09-06 13:48 UTCEPSS rescore
  18. 2026-09-06 06:25 UTCGHSA enrichment
  19. 2026-09-05 18:27 UTCEG score recompute
  20. 2026-09-05 18:27 UTCGHSA enrichment
  21. 2026-09-05 03:49 UTCEG score recompute
  22. 2026-09-05 03:49 UTCGHSA enrichment
  23. 2026-09-04 09:36 UTCEG score recompute
  24. 2026-09-04 09:36 UTCGHSA enrichment
  25. 2026-09-04 05:07 UTCEPSS rescore
  26. 2026-09-03 19:17 UTCGHSA enrichment
  27. 2026-09-03 06:59 UTCGHSA enrichment
  28. 2026-09-02 08:38 UTCGHSA enrichment
  29. 2026-09-01 20:39 UTCEG score recompute
  30. 2026-09-01 20:39 UTCGHSA enrichment
  31. 2026-09-01 13:54 UTCEPSS rescore
  32. 2026-09-01 04:40 UTCEPSS rescore
  33. 2026-08-31 22:50 UTCGHSA enrichment
  34. 2026-08-30 21:55 UTCEG score recompute
  35. 2026-08-30 21:55 UTCGHSA enrichment
  36. 2026-08-30 19:17 UTCEPSS rescore
  37. 2026-08-30 09:56 UTCGHSA enrichment
  38. 2026-08-29 21:25 UTCEG score recompute
  39. 2026-08-29 21:25 UTCGHSA enrichment
  40. 2026-08-28 21:42 UTCEPSS rescore
  41. 2026-08-27 20:00 UTCEG score recompute
  42. 2026-08-27 20:00 UTCGHSA enrichment
  43. 2026-08-27 08:02 UTCGHSA enrichment
  44. 2026-08-26 17:33 UTCEG score recompute
  45. 2026-08-26 17:33 UTCGHSA enrichment
  46. 2026-08-26 14:47 UTCEPSS rescore
  47. 2026-08-26 14:16 UTCGHSA enrichment
  48. 2026-08-26 02:17 UTCGHSA enrichment
  49. 2026-08-25 14:19 UTCEG score recompute
  50. 2026-08-25 14:19 UTCGHSA enrichment
  51. 2026-08-25 13:49 UTCEPSS rescore
  52. 2026-08-25 02:20 UTCGHSA enrichment
  53. 2026-08-24 14:21 UTCEG score recompute
  54. 2026-08-24 14:21 UTCGHSA enrichment
  55. 2026-08-24 02:22 UTCGHSA enrichment
  56. 2026-08-23 14:18 UTCGHSA enrichment
  57. 2026-08-23 02:19 UTCEG score recompute
  58. 2026-08-23 02:19 UTCGHSA enrichment
  59. 2026-08-23 00:19 UTCEPSS rescore
  60. 2026-08-22 14:21 UTCGHSA enrichment
  61. 2026-08-22 02:22 UTCEG score recompute
  62. 2026-08-22 02:22 UTCGHSA enrichment
  63. 2026-08-21 23:49 UTCEPSS rescore
  64. 2026-08-21 14:18 UTCGHSA enrichment
  65. 2026-08-21 02:19 UTCEG score recompute
  66. 2026-08-21 02:19 UTCGHSA enrichment
  67. 2026-08-20 22:56 UTCEPSS rescore
  68. 2026-08-20 14:20 UTCGHSA enrichment
  69. 2026-08-20 00:54 UTCEG score recompute
  70. 2026-08-20 00:54 UTCGHSA enrichment
  71. 2026-08-19 17:04 UTCEPSS rescore
  72. 2026-08-19 12:50 UTCGHSA enrichment
  73. 2026-08-19 00:51 UTCEG score recompute
  74. 2026-08-19 00:51 UTCGHSA enrichment
  75. 2026-08-18 13:49 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-71259?
CVE-2026-71259 is a high vulnerability published on August 5, 2026. ESPHome through 2026.7.0-dev contains an operator-precedence bug in the cv.url validator in esphome/configvalidation.py. Because binds tighter than , any file: URI passes validation regardless of netloc. This validator gates the field of the externalcomponents YAML directive's git source schema,…
When was CVE-2026-71259 disclosed?
CVE-2026-71259 was first published in the National Vulnerability Database on August 5, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71259 actively exploited?
CVE-2026-71259 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 98.0% of all scored CVEs.
What is the CVSS score of CVE-2026-71259?
CVE-2026-71259 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-71259?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71259, 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.

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