CVE-2026-47645

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-19. the CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

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

Url redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to elevate privileges over a network.

CVSS v3
8.8
EG Score
8.8(high)
EPSS
32.7%
KEV
Not listed

Published

June 19, 2026

Last Modified

July 1, 2026

Advisory Details (1)

Auto-updated Jun 22, 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-2026-47645

Vendor Advisories for CVE-2026-47645(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 51× in last 7d / 130× 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 130 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-47645?
CVE-2026-47645 is a high vulnerability published on June 19, 2026. Url redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to elevate privileges over a network.
When was CVE-2026-47645 disclosed?
CVE-2026-47645 was first published in the National Vulnerability Database on June 19, 2026, with the most recent update on July 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47645 actively exploited?
CVE-2026-47645 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 32.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-47645?
CVE-2026-47645 has a CVSS v4.0 base score of 8.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-47645?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47645, 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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