CVE-2026-71279

HIGHPre-NVD 8.08.0—
EchelonGraph scoreHIGH confidence

Score 8.0 from GitHub Security Advisory (severity: HIGH) published 2026-08-05. a secondary CVSS source baseline 8.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.0Exploit: None knownExposed: 0

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

Zigbee2MQTT's ExternalJSExtension.getFilePath (lib/extension/externalJS.ts) joins a parameter received via an MQTT message (topic zigbee2mqtt/bridge/request/extension/save) into the extensions base path using path.join(basePath, name) with no sanitization. The extension handler only validates that the name ends in .js/.mjs/.cjs, writes the file, and then dynamically imports it via Node.js import, achieving remote code execution.

CVSS v3
8.0
EG Score
8.0(high)
EG Risk
36(Track)
EG Risk 36/100SSVC: 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
Severity80% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
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

zigbee2mqtt/lib/extension/externalJS.ts at master · Koenkk/zigbee2mqtt · GitHub

https://github.com/Koenkk/zigbee2mqtt/blob/master/lib/extension/externalJS.ts
generic

GitHub - Koenkk/zigbee2mqtt: Zigbee 🐝 to MQTT bridge 🌉, get rid of your proprietary Zigbee bridges 🔨 · GitHub

https://github.com/Koenkk/zigbee2mqtt

Vendor Advisories for CVE-2026-71279(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 31× in last 7d / 78× 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 08:06 UTCEG score recompute
  2. 2026-08-21 08:06 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 20:18 UTCGHSA enrichment
  5. 2026-08-20 08:30 UTCGHSA enrichment
  6. 2026-08-19 20:42 UTCEG score recompute
  7. 2026-08-19 20:42 UTCGHSA enrichment
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-19 08:53 UTCGHSA enrichment
  10. 2026-08-18 21:01 UTCEG score recompute
  11. 2026-08-18 21:01 UTCGHSA enrichment
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 13:49 UTCEPSS rescore
  14. 2026-08-18 09:13 UTCGHSA enrichment
  15. 2026-08-17 21:24 UTCEG score recompute
  16. 2026-08-17 21:24 UTCGHSA enrichment
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-17 09:36 UTCGHSA enrichment
  19. 2026-08-16 21:48 UTCEG score recompute
  20. 2026-08-16 21:48 UTCGHSA enrichment
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 14:56 UTCEPSS rescore
  23. 2026-08-16 09:59 UTCEG score recompute
  24. 2026-08-16 09:59 UTCGHSA enrichment
  25. 2026-08-16 02:15 UTCEPSS rescore
Show 53 more
  1. 2026-08-15 22:12 UTCGHSA enrichment
  2. 2026-08-15 10:24 UTCEG score recompute
  3. 2026-08-15 10:24 UTCGHSA enrichment
  4. 2026-08-15 01:31 UTCEPSS rescore
  5. 2026-08-14 22:35 UTCGHSA enrichment
  6. 2026-08-14 10:47 UTCGHSA enrichment
  7. 2026-08-13 22:59 UTCEG score recompute
  8. 2026-08-13 22:59 UTCGHSA enrichment
  9. 2026-08-13 22:00 UTCEPSS rescore
  10. 2026-08-13 11:11 UTCGHSA enrichment
  11. 2026-08-12 23:23 UTCEG score recompute
  12. 2026-08-12 23:23 UTCGHSA enrichment
  13. 2026-08-12 13:51 UTCEPSS rescore
  14. 2026-08-12 11:36 UTCGHSA enrichment
  15. 2026-08-11 23:48 UTCEG score recompute
  16. 2026-08-11 23:48 UTCGHSA enrichment
  17. 2026-08-11 12:00 UTCGHSA enrichment
  18. 2026-08-11 00:12 UTCEG score recompute
  19. 2026-08-11 00:12 UTCGHSA enrichment
  20. 2026-08-11 00:00 UTCEPSS rescore
  21. 2026-08-10 12:24 UTCEG score recompute▼ 0.10
  22. 2026-08-10 12:24 UTCGHSA enrichment
  23. 2026-08-10 12:20 UTCNVD updateCVSS v3 → 8
  24. 2026-08-10 11:42 UTCGHSA enrichment
  25. 2026-08-10 11:22 UTCEG score recompute▲ 0.10
  26. 2026-08-10 11:21 UTCGHSA enrichment
  27. 2026-08-10 11:21 UTCMITRE cvelistV5CVSS v3 → 8.1
  28. 2026-08-10 02:42 UTCGHSA enrichment
  29. 2026-08-09 14:55 UTCEG score recompute
  30. 2026-08-09 14:55 UTCGHSA enrichment
  31. 2026-08-09 13:47 UTCEPSS rescore
  32. 2026-08-09 03:07 UTCEG score recompute
  33. 2026-08-09 03:07 UTCGHSA enrichment
  34. 2026-08-08 16:37 UTCEPSS rescore
  35. 2026-08-08 15:19 UTCGHSA enrichment
  36. 2026-08-08 03:30 UTCEG score recompute
  37. 2026-08-08 03:30 UTCGHSA enrichment
  38. 2026-08-07 15:42 UTCGHSA enrichment
  39. 2026-08-07 03:54 UTCGHSA enrichment
  40. 2026-08-06 16:06 UTCEG score recompute
  41. 2026-08-06 16:06 UTCGHSA enrichment
  42. 2026-08-06 13:47 UTCEPSS rescore
  43. 2026-08-06 04:17 UTCGHSA enrichment
  44. 2026-08-05 16:29 UTCEG score recompute▼ 0.10
  45. 2026-08-05 16:29 UTCGHSA enrichment
  46. 2026-08-05 16:27 UTCNVD updateCVSS v3 → 8
  47. 2026-08-05 16:13 UTCEG score recompute▲ 0.10
  48. 2026-08-05 16:12 UTCGHSA enrichment
  49. 2026-08-05 16:10 UTCMITRE cvelistV5CVSS v3 → 8.1
  50. 2026-08-05 13:28 UTCEG score recompute▼ 0.10
  51. 2026-08-05 13:25 UTCNVD updateCVSS v3 → 8
  52. 2026-08-05 13:07 UTCEG score recompute
  53. 2026-08-05 13:07 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-71279?
CVE-2026-71279 is a high vulnerability published on August 5, 2026. Zigbee2MQTT's ExternalJSExtension.getFilePath (lib/extension/externalJS.ts) joins a parameter received via an MQTT message (topic zigbee2mqtt/bridge/request/extension/save) into the extensions base path using path.join(basePath, name) with no sanitization. The extension handler only validates that…
When was CVE-2026-71279 disclosed?
CVE-2026-71279 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-2026-71279 actively exploited?
CVE-2026-71279 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 70.4% of all scored CVEs.
What is the CVSS score of CVE-2026-71279?
CVE-2026-71279 has a CVSS v3 base score of 8.0 (NVD).
How do I remediate CVE-2026-71279?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71279, 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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