CVE-2026-45489

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-07-03. the CNA's CVSS baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

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

Microsoft Edge (Chromium-based) Spoofing Vulnerability

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
38.3%
KEV
Not listed

Published

July 3, 2026

Last Modified

July 22, 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-2026-45489

Vendor Advisories for CVE-2026-45489(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 16× in last 7d / 54× 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. 2026-07-23 03:16 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
  4. 2026-07-20 17:08 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 03:49 UTCEG score recompute
  7. 2026-07-19 03:49 UTCVendor advisory
  8. 2026-07-19 03:48 UTCGHSA enrichment
  9. 2026-07-19 02:29 UTCEPSS rescore
  10. 2026-07-18 10:04 UTCEPSS rescore
  11. 2026-07-17 13:53 UTCEG score recompute
  12. 2026-07-17 13:53 UTCVendor advisory
  13. 2026-07-17 13:53 UTCGHSA enrichment
  14. 2026-07-16 17:03 UTCEPSS rescore
  15. 2026-07-16 07:55 UTCVendor advisory
  16. 2026-07-16 07:55 UTCGHSA enrichment
  17. 2026-07-15 16:57 UTCEPSS rescore
  18. 2026-07-15 09:03 UTCVendor advisory
  19. 2026-07-15 09:03 UTCGHSA enrichment
  20. 2026-07-15 02:00 UTCEPSS rescore
  21. 2026-07-14 10:11 UTCVendor advisory
  22. 2026-07-14 10:11 UTCGHSA enrichment
  23. 2026-07-13 22:30 UTCEPSS rescore
  24. 2026-07-13 11:19 UTCGHSA enrichment
  25. 2026-07-13 06:13 UTCEPSS rescore
Show 29 more
  1. 2026-07-12 12:27 UTCVendor advisory
  2. 2026-07-12 12:27 UTCGHSA enrichment
  3. 2026-07-12 05:46 UTCEPSS rescore
  4. 2026-07-11 13:35 UTCVendor advisory
  5. 2026-07-11 13:35 UTCGHSA enrichment
  6. 2026-07-11 08:27 UTCEPSS rescore
  7. 2026-07-10 14:42 UTCVendor advisory
  8. 2026-07-10 14:42 UTCGHSA enrichment
  9. 2026-07-09 19:10 UTCEPSS rescore
  10. 2026-07-09 15:49 UTCVendor advisory
  11. 2026-07-09 15:49 UTCGHSA enrichment
  12. 2026-07-08 16:54 UTCVendor advisory
  13. 2026-07-08 16:53 UTCGHSA enrichment
  14. 2026-07-08 15:16 UTCEPSS rescore
  15. 2026-07-07 18:02 UTCVendor advisory
  16. 2026-07-07 18:01 UTCGHSA enrichment
  17. 2026-07-07 13:46 UTCEPSS rescore
  18. 2026-07-06 19:09 UTCVendor advisory
  19. 2026-07-06 19:09 UTCGHSA enrichment
  20. 2026-07-06 16:27 UTCEPSS rescore
  21. 2026-07-06 02:23 UTCEPSS rescore
  22. 2026-07-05 20:14 UTCVendor advisory
  23. 2026-07-05 20:14 UTCGHSA enrichment
  24. 2026-07-05 02:30 UTCEPSS rescore
  25. 2026-07-04 21:21 UTCVendor advisory
  26. 2026-07-04 21:21 UTCGHSA enrichment
  27. 2026-07-03 22:29 UTCEG score recompute
  28. 2026-07-03 22:29 UTCVendor advisory
  29. 2026-07-03 22:29 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-45489?
CVE-2026-45489 is a medium vulnerability published on July 3, 2026. Microsoft Edge (Chromium-based) Spoofing Vulnerability
When was CVE-2026-45489 disclosed?
CVE-2026-45489 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-2026-45489 actively exploited?
CVE-2026-45489 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 38.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45489?
CVE-2026-45489 has a CVSS v4.0 base score of 6.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-45489?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45489, 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-2026-45489

Explore →

Is Your Infrastructure Affected by CVE-2026-45489?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs