CVE-2026-58289

CRITICALPre-NVD 9.09.0—
EchelonGraph scoreHIGH confidence

Score 9.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-03. a secondary CVSS source baseline 9.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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: 1%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)
EPSS
40.9%
KEV
Not listed

Published

July 3, 2026

Last Modified

July 7, 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(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.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 62× in last 7d / 62× 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. 2026-07-07 04:33 UTCEG score recompute
  2. 2026-07-07 04:33 UTCVendor advisory
  3. 2026-07-07 04:33 UTCGHSA enrichment
  4. 2026-07-07 00:13 UTCEG score recompute
  5. 2026-07-07 00:13 UTCVendor advisory
  6. 2026-07-07 00:13 UTCGHSA enrichment
  7. 2026-07-06 19:54 UTCEG score recompute
  8. 2026-07-06 19:54 UTCVendor advisory
  9. 2026-07-06 19:54 UTCGHSA enrichment
  10. 2026-07-06 16:27 UTCEPSS rescore
  11. 2026-07-06 16:27 UTCEPSS rescore
  12. 2026-07-06 15:32 UTCEG score recompute
  13. 2026-07-06 15:32 UTCVendor advisory
  14. 2026-07-06 15:32 UTCGHSA enrichment
  15. 2026-07-06 11:12 UTCEG score recompute
  16. 2026-07-06 11:12 UTCVendor advisory
  17. 2026-07-06 11:12 UTCGHSA enrichment
  18. 2026-07-06 06:50 UTCEG score recompute
  19. 2026-07-06 06:50 UTCVendor advisory
  20. 2026-07-06 06:50 UTCGHSA enrichment
  21. 2026-07-06 02:31 UTCEG score recompute
  22. 2026-07-06 02:31 UTCVendor advisory
  23. 2026-07-06 02:31 UTCGHSA enrichment
  24. 2026-07-06 02:23 UTCEPSS rescore
  25. 2026-07-06 02:23 UTCEPSS rescore
Show 37 more
  1. 2026-07-05 22:11 UTCEG score recompute
  2. 2026-07-05 22:11 UTCVendor advisory
  3. 2026-07-05 22:10 UTCGHSA enrichment
  4. 2026-07-05 17:50 UTCEG score recompute
  5. 2026-07-05 17:50 UTCVendor advisory
  6. 2026-07-05 17:50 UTCGHSA enrichment
  7. 2026-07-05 13:30 UTCEG score recompute
  8. 2026-07-05 13:30 UTCVendor advisory
  9. 2026-07-05 13:30 UTCGHSA enrichment
  10. 2026-07-05 09:10 UTCEG score recompute
  11. 2026-07-05 09:10 UTCVendor advisory
  12. 2026-07-05 09:10 UTCGHSA enrichment
  13. 2026-07-05 04:50 UTCEG score recompute
  14. 2026-07-05 04:50 UTCVendor advisory
  15. 2026-07-05 04:49 UTCGHSA enrichment
  16. 2026-07-05 02:31 UTCEPSS rescore
  17. 2026-07-05 02:30 UTCEPSS rescore
  18. 2026-07-05 00:29 UTCEG score recompute
  19. 2026-07-05 00:29 UTCVendor advisory
  20. 2026-07-05 00:29 UTCGHSA enrichment
  21. 2026-07-04 20:09 UTCEG score recompute
  22. 2026-07-04 20:09 UTCVendor advisory
  23. 2026-07-04 20:09 UTCGHSA enrichment
  24. 2026-07-04 15:50 UTCEG score recompute
  25. 2026-07-04 15:50 UTCVendor advisory
  26. 2026-07-04 11:31 UTCEG score recompute
  27. 2026-07-04 11:31 UTCVendor advisory
  28. 2026-07-04 11:30 UTCGHSA enrichment
  29. 2026-07-04 07:11 UTCEG score recompute
  30. 2026-07-04 07:11 UTCVendor advisory
  31. 2026-07-04 07:10 UTCGHSA enrichment
  32. 2026-07-04 02:48 UTCEG score recompute
  33. 2026-07-04 02:48 UTCVendor advisory
  34. 2026-07-04 02:47 UTCGHSA enrichment
  35. 2026-07-03 22:27 UTCEG score recompute
  36. 2026-07-03 22:27 UTCVendor advisory
  37. 2026-07-03 22:27 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 7, 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 40.9% 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 v3 base score of 9.0 (NVD).
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

Explore the affected products and dependency analysis for CVE-2026-58289

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