CVE-2026-9740

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-10. 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
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

A vulnerability in MongoDB Server's BSON validation logic allows an unauthenticated user to crash the mongod process by sending a specially crafted message. The BSON validator's handling of certain nested binary data structures permits uncontrolled mutual recursion between validation functions, where each re-entry resets internal depth tracking.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
26.5%
KEV
Not listed

Published

June 9, 2026

Last Modified

June 15, 2026

Advisory Details (1)

Auto-updated Jun 10, 2026
No patch confirmed yet.
generic

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https://jira.mongodb.org/browse/SERVER-125063

Vendor Advisories for CVE-2026-9740(1)

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 28× in last 7d / 123× 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 123 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-9740?
CVE-2026-9740 is a high vulnerability published on June 9, 2026. A vulnerability in MongoDB Server's BSON validation logic allows an unauthenticated user to crash the mongod process by sending a specially crafted message. The BSON validator's handling of certain nested binary data structures permits uncontrolled mutual recursion between validation functions,…
When was CVE-2026-9740 disclosed?
CVE-2026-9740 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on June 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9740 actively exploited?
CVE-2026-9740 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 26.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9740?
CVE-2026-9740 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-9740?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9740, 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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