Vulnerability from bitnami_vulndb
Published
2026-06-16 11:48
Modified
2026-09-08 08:34
Summary
Metadata name collision on $-prefixed fields causes post-auth server crash
Details

An authenticated user can cause a MongoDB server to crash or return incorrect results by creating documents that interfere with internal metadata processing during query execution. This stems from insufficient separation between user-controlled document fields and internal metadata in certain execution paths.

To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "mongodb",
        "purl": "pkg:bitnami/mongodb"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.0.0"
            },
            {
              "fixed": "7.0.35"
            },
            {
              "introduced": "8.0.0"
            },
            {
              "fixed": "8.0.24"
            },
            {
              "introduced": "8.2.0"
            },
            {
              "fixed": "8.2.10"
            },
            {
              "introduced": "8.3.0"
            },
            {
              "fixed": "8.3.3"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "type": "CVSS_V4"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-9750"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "An authenticated user can cause a MongoDB server to crash or return incorrect results by creating documents that interfere with internal metadata processing during query execution. This stems from insufficient separation between user-controlled document fields and internal metadata in certain execution paths.",
  "id": "BIT-mongodb-2026-9750",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2026-06-16T11:48:15.130Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://jira.mongodb.org/browse/SERVER-123633"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9750"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Metadata name collision on $-prefixed fields causes post-auth server crash"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.