CVE-2026-18954

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-08-05. A secondary CVSS source baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Incorrect authorization in the aggregation pipeline tool in Amazon AWS Labs DocumentDB MCP Server before 1.0.12 might allow an authenticated MCP client to perform inappropriate write operations on the connected database via write-capable aggregation pipeline stages that bypass the read-only mode enforcement logic.

To remediate this issue, users should upgrade to version 1.0.12 or later.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100CISA SSVC

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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
4th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 5, 2026

Last Modified

August 10, 2026

Advisory Details (2)

Auto-updated Aug 5, 2026
Patch available. Sources: github_release.
generic

CVE-2026-18954 - Incorrect authorization in the aggregation pipeline tool in Amazon AWS Labs DocumentDB MCP Server

https://aws.amazon.com/security/security-bulletins/2026-076-aws/
github_release Patch Available

2026.04.20260408085348

Patch available: awslabs/mcp 2026.04.20260408085348

https://github.com/awslabs/mcp/releases/tag/2026.04.20260408085348

Vendor Advisories for CVE-2026-18954(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 13× in last 7d / 56× 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 144 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-18954?
CVE-2026-18954 is a medium vulnerability published on August 5, 2026. Incorrect authorization in the aggregation pipeline tool in Amazon AWS Labs DocumentDB MCP Server before 1.0.12 might allow an authenticated MCP client to perform inappropriate write operations on the connected database via write-capable aggregation pipeline stages that bypass the read-only mode…
When was CVE-2026-18954 disclosed?
CVE-2026-18954 was first published on August 5, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18954 actively exploited?
CVE-2026-18954 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (4th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18954?
CVE-2026-18954 has a CVSS base score of 5.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18954?
A fix for CVE-2026-18954 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-18954 are linked in the Vendor Advisories panel on this page.

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