Vulnerability from bitnami_vulndb
Published
2026-08-19 08:49
Modified
2026-08-19 09:09
Summary
Out-of-Bounds Heap Read in BSON CodeWScope Element Parsing via Malformed BSONColumn Data
Details

A missing bounds check in the BSON CodeWScope element accessors allows an attacker to trigger an out-of-bounds heap read via a crafted aggregation pipeline. The vulnerability can be exploited by an authenticated user by generating a malformed BSONColumn data containing a CodeWScope element, bypassing wire-level BSON validation. When the forged element is decompressed, the unchecked size value is used in pointer arithmetic, causing either a server crash or disclosure of adjacent heap memory contents.

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "mongodb",
        "purl": "pkg:bitnami/mongodb"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.0.0"
            },
            {
              "fixed": "7.0.39"
            },
            {
              "introduced": "8.0.0"
            },
            {
              "fixed": "8.0.28"
            },
            {
              "introduced": "8.2.0"
            },
            {
              "fixed": "8.2.12"
            },
            {
              "introduced": "8.3.0"
            },
            {
              "fixed": "8.3.7"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/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-2026-13077"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "A missing bounds check in the BSON CodeWScope element accessors allows an attacker to trigger an out-of-bounds heap read via a crafted aggregation pipeline. The vulnerability can be exploited by an authenticated user by generating a malformed BSONColumn data containing a CodeWScope element, bypassing wire-level BSON validation. When the forged element is decompressed, the unchecked size value is used in pointer arithmetic, causing either a server crash or disclosure of adjacent heap memory contents.",
  "id": "BIT-mongodb-2026-13077",
  "modified": "2026-08-19T09:09:14.600Z",
  "published": "2026-08-19T08:49:30.224Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://jira.mongodb.org/browse/SERVER-129103"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13077"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Out-of-Bounds Heap Read in BSON CodeWScope Element Parsing via Malformed BSONColumn Data"
}



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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.
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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.