CVE-2026-55945

MEDIUMPre-NVD 4.24.2—
EchelonGraph scoreMEDIUM confidence

Score 4.2 from GitHub Security Advisory published 2026-07-03. the CNA's CVSS baseline 4.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
4.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.2Exploit: None knownExposed: 0

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

Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Edge (Chromium-based) allows an authorized attacker to disclose information locally.

CVSS v3
4.2
EG Score
4.2(medium)
EG Risk
19(Track)
EG Risk 19/100SSVC: 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
Severity42% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

July 3, 2026

Last Modified

September 9, 2026

Advisory Details (1)

Auto-updated Jul 8, 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-2026-55945

Vendor Advisories for CVE-2026-55945(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 15× in last 7d / 101× 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 247 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-55945?
CVE-2026-55945 is a medium vulnerability published on July 3, 2026. Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Edge (Chromium-based) allows an authorized attacker to disclose information locally.
When was CVE-2026-55945 disclosed?
CVE-2026-55945 was first published in the National Vulnerability Database on July 3, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55945 actively exploited?
CVE-2026-55945 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 91.7% of all scored CVEs.
What is the CVSS score of CVE-2026-55945?
CVE-2026-55945 has a CVSS v4.0 base score of 4.2 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-55945?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55945, 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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