CVE-2026-58283

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-03. the CNA's CVSS baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 0

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

Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

July 3, 2026

Last Modified

August 24, 2026

Advisory Details (1)

Auto-updated Jul 7, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58283

Vendor Advisories for CVE-2026-58283(2)

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 40× in last 7d / 193× 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 312 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-58283?
CVE-2026-58283 is a high vulnerability published on July 3, 2026. Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.
When was CVE-2026-58283 disclosed?
CVE-2026-58283 was first published in the National Vulnerability Database on July 3, 2026, with the most recent update on August 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58283 actively exploited?
CVE-2026-58283 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 63.3% of all scored CVEs.
What is the CVSS score of CVE-2026-58283?
CVE-2026-58283 has a CVSS v4.0 base score of 8.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-58283?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58283, 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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