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
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

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
6.5MEDIUMmedium confidence
EG Risk
34
EG Risk 34/100

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%
EPSS PROB
0.5%
EPSS %ILE
38th
KEV
Not listed

Published

June 9, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Jun 14, 2026
Fix referenced — no release confirmed yet.
generic

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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 7× in last 7d / 32× 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 212 total refreshes for this CVE.

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

Related CVEs(same CWE)

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 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 0.5% probability of exploitation in the next 30 days (38th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-9749?
CVE-2026-9749 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-9749?
A fix for CVE-2026-9749 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-9749 are linked in the Vendor Advisories panel on this page.

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