CVE-2023-43686

MEDIUMPre-NVD 6.26.2—
EchelonGraph scoreHIGH confidence

Score 6.2 from GitHub Security Advisory published 2026-06-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
6.2
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.2Exploit: NoneExposed: 0

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

An issue was discovered in Malwarebytes 4.x and 5.x (and Nebula 2020-10-21 and later). A large number of Firefox preference files can cause the parser to ignore other browser configuration files, leading to a denial of service.

CVSS v3
6.2
EG Score
6.2(high)
EPSS
2.0%
KEV
Not listed

Published

June 9, 2026

Last Modified

June 9, 2026

Advisory Details (1)

Auto-updated Jun 14, 2026
No patch confirmed yet.
generic

CVE-2023-43686 - Malwarebytes, Nebula - Improper Handling of Exceptional Condition

https://www.malwarebytes.com/secure/cves/cve-2023-43686

Vendor Advisories for CVE-2023-43686(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 20× in last 7d / 89× 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. 2026-07-06 16:26 UTCEPSS rescore
  2. 2026-07-06 16:26 UTCEPSS rescore
  3. 2026-07-06 02:22 UTCEPSS rescore
  4. 2026-07-05 23:33 UTCEG score recompute
  5. 2026-07-05 23:33 UTCGHSA enrichment
  6. 2026-07-05 02:29 UTCEPSS rescore
  7. 2026-07-04 22:50 UTCEG score recompute
  8. 2026-07-04 22:50 UTCGHSA enrichment
  9. 2026-07-04 06:29 UTCEPSS rescore
  10. 2026-07-03 21:55 UTCEG score recompute
  11. 2026-07-03 21:55 UTCGHSA enrichment
  12. 2026-07-02 21:10 UTCEG score recompute
  13. 2026-07-02 21:10 UTCGHSA enrichment
  14. 2026-07-01 20:27 UTCEG score recompute
  15. 2026-07-01 20:27 UTCGHSA enrichment
  16. 2026-07-01 15:05 UTCEPSS rescore
  17. 2026-06-30 23:21 UTCEPSS rescore
  18. 2026-06-30 23:21 UTCEPSS rescore
  19. 2026-06-30 19:44 UTCEG score recompute
  20. 2026-06-30 19:44 UTCGHSA enrichment
  21. 2026-06-29 19:02 UTCEG score recompute
  22. 2026-06-29 19:01 UTCGHSA enrichment
  23. 2026-06-29 14:05 UTCEPSS rescore
  24. 2026-06-28 16:47 UTCEG score recompute
  25. 2026-06-28 16:47 UTCGHSA enrichment
Show 64 more
  1. 2026-06-28 14:06 UTCEPSS rescore
  2. 2026-06-28 14:06 UTCEPSS rescore
  3. 2026-06-28 04:55 UTCEPSS rescore
  4. 2026-06-28 04:55 UTCEPSS rescore
  5. 2026-06-27 16:04 UTCEG score recompute
  6. 2026-06-27 16:04 UTCGHSA enrichment
  7. 2026-06-27 03:07 UTCEPSS rescore
  8. 2026-06-27 03:07 UTCEPSS rescore
  9. 2026-06-26 15:20 UTCEG score recompute
  10. 2026-06-26 15:20 UTCGHSA enrichment
  11. 2026-06-25 14:38 UTCEG score recompute
  12. 2026-06-25 14:38 UTCGHSA enrichment
  13. 2026-06-25 13:48 UTCEPSS rescore
  14. 2026-06-25 13:48 UTCEPSS rescore
  15. 2026-06-24 13:55 UTCEG score recompute
  16. 2026-06-24 13:54 UTCGHSA enrichment
  17. 2026-06-23 21:31 UTCEPSS rescore
  18. 2026-06-23 21:31 UTCEPSS rescore
  19. 2026-06-23 13:11 UTCEG score recompute
  20. 2026-06-23 13:11 UTCGHSA enrichment
  21. 2026-06-22 14:24 UTCEPSS rescore
  22. 2026-06-22 14:24 UTCEPSS rescore
  23. 2026-06-22 11:35 UTCEG score recompute
  24. 2026-06-22 11:35 UTCGHSA enrichment
  25. 2026-06-21 14:55 UTCEPSS rescore
  26. 2026-06-21 14:55 UTCEPSS rescore
  27. 2026-06-21 10:24 UTCEG score recompute
  28. 2026-06-21 10:24 UTCGHSA enrichment
  29. 2026-06-21 01:58 UTCEPSS rescore
  30. 2026-06-21 01:58 UTCEPSS rescore
  31. 2026-06-20 09:34 UTCEG score recompute
  32. 2026-06-20 09:34 UTCGHSA enrichment
  33. 2026-06-19 19:24 UTCEPSS rescore
  34. 2026-06-19 19:24 UTCEPSS rescore
  35. 2026-06-19 08:29 UTCEG score recompute
  36. 2026-06-19 08:29 UTCGHSA enrichment
  37. 2026-06-18 17:51 UTCEPSS rescore
  38. 2026-06-18 07:12 UTCEG score recompute
  39. 2026-06-18 07:12 UTCGHSA enrichment
  40. 2026-06-17 17:51 UTCEPSS rescore
  41. 2026-06-17 17:51 UTCEPSS rescore
  42. 2026-06-17 04:31 UTCEG score recompute
  43. 2026-06-17 04:31 UTCGHSA enrichment
  44. 2026-06-16 03:46 UTCEG score recompute
  45. 2026-06-16 03:45 UTCGHSA enrichment
  46. 2026-06-15 17:47 UTCEPSS rescore
  47. 2026-06-15 17:47 UTCEPSS rescore
  48. 2026-06-15 03:03 UTCEG score recompute
  49. 2026-06-15 03:03 UTCGHSA enrichment
  50. 2026-06-14 23:16 UTCEPSS rescore
  51. 2026-06-14 02:20 UTCEG score recompute
  52. 2026-06-14 02:20 UTCGHSA enrichment
  53. 2026-06-13 22:59 UTCEPSS rescore
  54. 2026-06-13 22:59 UTCEPSS rescore
  55. 2026-06-13 01:35 UTCEG score recompute▲ 6.20
  56. 2026-06-13 01:35 UTCGHSA enrichment
  57. 2026-06-12 23:10 UTCEPSS rescore
  58. 2026-06-12 23:10 UTCEPSS rescore
  59. 2026-06-11 13:59 UTCEPSS rescore
  60. 2026-06-11 13:59 UTCEPSS rescore
  61. 2026-06-10 22:17 UTCEPSS rescore
  62. 2026-06-09 21:17 UTCNVD updateCVSS v3 → 6.2 · severity → MEDIUM
  63. 2026-06-09 19:18 UTCEG score recompute
  64. 2026-06-09 19:17 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2023-43686?
CVE-2023-43686 is a medium vulnerability published on June 9, 2026. An issue was discovered in Malwarebytes 4.x and 5.x (and Nebula 2020-10-21 and later). A large number of Firefox preference files can cause the parser to ignore other browser configuration files, leading to a denial of service.
When was CVE-2023-43686 disclosed?
CVE-2023-43686 was first published in the National Vulnerability Database on June 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-43686 actively exploited?
CVE-2023-43686 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-43686?
CVE-2023-43686 has a CVSS v3.1 base score of 6.2 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2023-43686?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-43686, 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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