CVE-2026-9749

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-10. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 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%CVSS: 6.5Exploit: None knownExposed: 0

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

This issue can occur when running an aggregation pipeline that uses the internal $exchange stage configured with key-range partitioning and order-preserving delivery. If a single key range produces enough documents to fill its exchange buffer (that is, many results are routed to the same consumer), the server reaches the code path where a full per-consumer buffer is detected but the internal "high watermark" for that key range is not updated as intended.

CVSS v3
6.5
EG Score
6.5(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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

June 9, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Jun 14, 2026
No patch confirmed yet.
generic

Loading...

https://jira.mongodb.org/browse/SERVER-124031

Vendor Advisories for CVE-2026-9749(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 14× in last 7d / 77× 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 166 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-9749?
CVE-2026-9749 is a medium vulnerability published on June 9, 2026. This issue can occur when running an aggregation pipeline that uses the internal $exchange stage configured with key-range partitioning and order-preserving delivery. If a single key range produces enough documents to fill its exchange buffer (that is, many results are routed to the same consumer),…
When was CVE-2026-9749 disclosed?
CVE-2026-9749 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9749 actively exploited?
CVE-2026-9749 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 81.3% of all scored CVEs.
What is the CVSS score of CVE-2026-9749?
CVE-2026-9749 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-9749?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9749, 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

Explore the affected products and dependency analysis for CVE-2026-9749

Explore →

Is Your Infrastructure Affected by CVE-2026-9749?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs