CVE-2026-47831

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-09. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

Use of a cryptographically weak random number generator in the GenerateRandomPassword function in bosh-windows-stemcell-builder allows a remote attacker to brute-force the resulting SSH login via TCP/22. Affected versions: bosh-windows-stemcell-builder versions prior to v2019.98.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 9, 2026

Advisory Details (1)

Auto-updated Jul 9, 2026
No patch confirmed yet.
generic

CVE-2026-47831 - Cryptographically Weak Password Generation in bosh-windows-stemcell-builder Allows Remote SSH Brute-Force Attacks | Cloud Foundry

https://www.cloudfoundry.org/blog/cve-2026-47831-cryptographically-weak-password-generation-in-bosh-windows-stemcell-builder-allows-remote-ssh-brute-force-attacks/

Vendor Advisories for CVE-2026-47831(1)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 110× 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 169 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-47831?
CVE-2026-47831 is a high vulnerability published on July 9, 2026. Use of a cryptographically weak random number generator in the GenerateRandomPassword function in bosh-windows-stemcell-builder allows a remote attacker to brute-force the resulting SSH login via TCP/22. Affected versions: bosh-windows-stemcell-builder versions prior to v2019.98.
When was CVE-2026-47831 disclosed?
CVE-2026-47831 was first published in the National Vulnerability Database on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47831 actively exploited?
CVE-2026-47831 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 75.7% of all scored CVEs.
What is the CVSS score of CVE-2026-47831?
CVE-2026-47831 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-47831?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47831, 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.

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