CVE-2026-58289

CRITICALPre-NVD 9.09.0—
EchelonGraph scoreHIGH confidence

Score 9.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-03. the CNA's CVSS baseline 9.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
9.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.0Exploit: NoneExposed: 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 execute code over a network.

CVSS v3
9.0
EG Score
9.0(high)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity90% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
35.8%
KEV
Not listed

Published

July 3, 2026

Last Modified

July 22, 2026

Advisory Details (1)

Auto-updated Jul 6, 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-2026-58289

Vendor Advisories for CVE-2026-58289(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 17× in last 7d / 182× 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 182 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-58289?
CVE-2026-58289 is a critical vulnerability published on July 3, 2026. Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.
When was CVE-2026-58289 disclosed?
CVE-2026-58289 was first published in the National Vulnerability Database on July 3, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58289 actively exploited?
CVE-2026-58289 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 35.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-58289?
CVE-2026-58289 has a CVSS v4.0 base score of 9.0 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-58289?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58289, 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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