Vulnerability from bitnami_vulndb
Published
2026-06-23 14:48
Modified
2026-06-23 15:08
Summary
Post-authentication use-after-free in server-side JavaScript BSON-to-array conversion
Details

A use-after-free vulnerability exists in MongoDB Server's server-side JavaScript engine when converting BSON documents to JavaScript arrays. An authenticated user with read privileges who is able to run server-side JavaScript (for example, via $where or $function) can cause the server to access memory that has already been freed. This may result in disclosure of information from the mongod process memory or a denial of service through a server crash.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "mongodb",
        "purl": "pkg:bitnami/mongodb"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.4.0"
            },
            {
              "fixed": "4.4.31"
            },
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "5.0.34"
            },
            {
              "introduced": "6.0.0"
            },
            {
              "fixed": "6.0.29"
            },
            {
              "introduced": "7.0.0"
            },
            {
              "fixed": "7.0.37"
            },
            {
              "introduced": "8.0.0"
            },
            {
              "fixed": "8.0.26"
            },
            {
              "introduced": "8.2.0"
            },
            {
              "fixed": "8.2.11"
            },
            {
              "introduced": "8.3.0"
            },
            {
              "fixed": "8.3.4"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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-2026-11933"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*"
    ],
    "severity": "High"
  },
  "details": "A use-after-free vulnerability exists in MongoDB Server\u0027s server-side JavaScript engine when converting BSON documents to JavaScript arrays. An authenticated user with read privileges who is able to run server-side JavaScript (for example, via $where or $function) can cause the server to access memory that has already been freed. This may result in disclosure of information from the mongod process memory or a denial of service through a server crash.",
  "id": "BIT-mongodb-2026-11933",
  "modified": "2026-06-23T15:08:27.870Z",
  "published": "2026-06-23T14:48:21.005Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://jira.mongodb.org/browse/SERVER-128125"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11933"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Post-authentication use-after-free in server-side JavaScript BSON-to-array conversion"
}


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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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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.