CVE-2026-45489

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM 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
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.5Exploit: None knownExposed: 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(medium)
EG Risk
30(Track)
EG Risk 30/100SSVC: 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%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
56%
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-2026-45489

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 27× in last 7d / 128× 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 193 total refreshes for this CVE.

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

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 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-2026-45489 actively exploited?
CVE-2026-45489 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 43.7% of all scored CVEs.
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

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