{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "mongoose"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.13.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 7.8.8"
      },
      "package": {
        "ecosystem": "npm",
        "name": "mongoose"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.0.0"
            },
            {
              "fixed": "7.8.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 8.22.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "mongoose"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.0.0"
            },
            {
              "fixed": "8.22.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 9.1.5"
      },
      "package": {
        "ecosystem": "npm",
        "name": "mongoose"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "9.0.0"
            },
            {
              "fixed": "9.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42334"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-74"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-05T21:48:06Z",
    "nvd_published_at": "2026-05-14T18:16:47Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nThis vulnerability allows bypassing Mongoose\u2019s sanitizeFilter query sanitization mechanism via the `$nor` operator.\n\nWhen sanitizeFilter is enabled, Mongoose wraps query operators in `$eq` to neutralize them. However, prior to the fix, `$nor` was not included in the set of logical operators that are recursively sanitized. Because `$nor` accepts an array (like `$and` and `$or`), and arrays do not trigger `hasDollarKeys()`, malicious operators such as `$ne`, `$gt`, or `$regex` could be injected inside a `$nor` clause without being sanitized.\n\nThis may lead to:\n\n- Authentication bypass\n- Unauthorized data access\n- Data exfiltration\n\n**Affected users:**\n\nApplications that:\n\n- Explicitly enable sanitizeFilter\n- Pass unsanitized user-controlled input directly into query methods (e.g., `Model.findOne(req.body)`) and rely on `sanitizeFilter` to strip out query selectors\n\nApplications that validate input schemas, whitelist fields, or avoid passing raw request bodies into queries are not affected. For example, `Model.findOne({ user: req.body.user, pwd: req.body.pwd })` is not affected.\n\n### Patches\n\nPatches have been released for all supported Mongoose release lines:\n\n- `^6.13.9`\n- `^7.8.9`\n- `^8.22.1`\n- `^9.1.6`   \n\n### Workarounds\n\nDelete `$nor` keys, use an additional schema validation library, or write middleware to strip out `$nor` from query filters.\n\n### Resources\n\nsanitizeFilter documentation: https://mongoosejs.com/docs/api/mongoose.html#Mongoose.prototype.sanitizeFilter()\n\nOriginal blog post on sanitizeFilter: https://thecodebarbarian.com/whats-new-in-mongoose-6-sanitizefilter.html",
  "id": "GHSA-wpg9-53fq-2r8h",
  "modified": "2026-05-14T20:53:38Z",
  "published": "2026-05-05T21:48:06Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Automattic/mongoose/security/advisories/GHSA-wpg9-53fq-2r8h"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42334"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Automattic/mongoose"
    },
    {
      "type": "WEB",
      "url": "https://mongoosejs.com/docs/api/mongoose.html#Mongoose.prototype.sanitizeFilter()"
    },
    {
      "type": "WEB",
      "url": "https://thecodebarbarian.com/whats-new-in-mongoose-6-sanitizefilter.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Mongoose\u0027s Improper Sanitization of $nor in sanitizeFilter May Allow NoSQL Injection"
}