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: 0.9%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

Microsoft Edge (Chromium-based) Spoofing Vulnerability

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
30
EG Risk 30/100CISA SSVC

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%
CISA SSVC: Track at every mission impact level.
Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
0.9%
EPSS %ILE
57th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 3, 2026

Last Modified

October 8, 2026

Advisory Details (1)

Auto-updated Jul 7, 2026
Fix referenced — no release confirmed yet. Sources: microsoft.
microsoftMentions a patch (unverified)

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 10× in last 7d / 40× 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 272 total refreshes for this CVE.

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

Related CVEs(same CWE)

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 on July 3, 2026, with the most recent update on October 8, 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 0.9% probability of exploitation in the next 30 days (57th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-45489?
CVE-2026-45489 has a CVSS base score of 6.5 (the CNA's own assessment, by microsoft; NVD's own analysis pending).
How do I remediate CVE-2026-45489?
A fix for CVE-2026-45489 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-45489 are linked in the Vendor Advisories panel on this page.

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