CVE-2026-71259

HIGHPre-NVD 8.68.6—
EchelonGraph scoreHIGH 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(high)
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 10, 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 30× in last 7d / 69× 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. 2026-08-21 02:19 UTCEG score recompute
  2. 2026-08-21 02:19 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 14:20 UTCGHSA enrichment
  5. 2026-08-20 00:54 UTCEG score recompute
  6. 2026-08-20 00:54 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 12:50 UTCGHSA enrichment
  9. 2026-08-19 00:51 UTCEG score recompute
  10. 2026-08-19 00:51 UTCGHSA enrichment
  11. 2026-08-18 13:49 UTCEPSS rescore
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 12:49 UTCGHSA enrichment
  14. 2026-08-18 00:15 UTCEG score recompute
  15. 2026-08-18 00:15 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 12:07 UTCGHSA enrichment
  18. 2026-08-17 00:09 UTCEG score recompute
  19. 2026-08-17 00:09 UTCGHSA enrichment
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 12:10 UTCEG score recompute
  23. 2026-08-16 12:10 UTCGHSA enrichment
  24. 2026-08-16 02:15 UTCEPSS rescore
  25. 2026-08-16 00:12 UTCGHSA enrichment
Show 44 more
  1. 2026-08-15 12:13 UTCEG score recompute
  2. 2026-08-15 12:13 UTCGHSA enrichment
  3. 2026-08-15 01:31 UTCEPSS rescore
  4. 2026-08-15 00:14 UTCGHSA enrichment
  5. 2026-08-14 12:15 UTCGHSA enrichment
  6. 2026-08-14 00:17 UTCEG score recompute
  7. 2026-08-14 00:17 UTCGHSA enrichment
  8. 2026-08-13 22:00 UTCEPSS rescore
  9. 2026-08-13 12:18 UTCGHSA enrichment
  10. 2026-08-13 00:19 UTCEG score recompute
  11. 2026-08-13 00:19 UTCGHSA enrichment
  12. 2026-08-12 13:51 UTCEPSS rescore
  13. 2026-08-12 12:21 UTCGHSA enrichment
  14. 2026-08-12 00:22 UTCGHSA enrichment
  15. 2026-08-11 12:21 UTCGHSA enrichment
  16. 2026-08-11 00:23 UTCEG score recompute
  17. 2026-08-11 00:23 UTCGHSA enrichment
  18. 2026-08-11 00:00 UTCEPSS rescore
  19. 2026-08-10 12:24 UTCEG score recompute
  20. 2026-08-10 12:24 UTCGHSA enrichment
  21. 2026-08-10 12:02 UTCGHSA enrichment
  22. 2026-08-10 11:22 UTCEG score recompute
  23. 2026-08-10 11:22 UTCGHSA enrichment
  24. 2026-08-10 04:17 UTCGHSA enrichment
  25. 2026-08-09 16:18 UTCGHSA enrichment
  26. 2026-08-09 04:20 UTCEG score recompute
  27. 2026-08-09 04:20 UTCGHSA enrichment
  28. 2026-08-08 16:37 UTCEPSS rescore
  29. 2026-08-08 16:22 UTCGHSA enrichment
  30. 2026-08-08 04:23 UTCEG score recompute
  31. 2026-08-08 04:23 UTCGHSA enrichment
  32. 2026-08-07 16:24 UTCGHSA enrichment
  33. 2026-08-07 04:26 UTCGHSA enrichment
  34. 2026-08-06 16:27 UTCEG score recompute
  35. 2026-08-06 16:27 UTCGHSA enrichment
  36. 2026-08-06 13:47 UTCEPSS rescore
  37. 2026-08-06 04:29 UTCGHSA enrichment
  38. 2026-08-05 16:30 UTCEG score recompute
  39. 2026-08-05 16:30 UTCGHSA enrichment
  40. 2026-08-05 16:13 UTCEG score recompute
  41. 2026-08-05 16:13 UTCGHSA enrichment
  42. 2026-08-05 13:28 UTCEG score recompute
  43. 2026-08-05 13:08 UTCEG score recompute
  44. 2026-08-05 13:07 UTCMITRE cvelistV5first tracked

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 10, 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.

Dependency Blast Radius

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