{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:mongodb:c\\#_driver:*:*:*:*:*:mongodb:*:*",
            "extracted_events": [
              {
                "introduced": "2.14.0"
              },
              {
                "fixed": "3.11.2"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "2b37a1fe1cbdbe1a020b52b77f1197b6d77575e7"
            },
            {
              "fixed": "53e865892f159ae2c61f69f2203ac6da4c02ff16"
            }
          ],
          "repo": "https://github.com/mongodb/mongo-csharp-driver",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "mongodb",
    "cwe_ids": [
      "CWE-943"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88026.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "2.14.0"
          },
          {
            "last_affected": "3.11.1"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Improper neutralization of regular-expression metacharacters in the LINQ query translation component of the MongoDB C# Driver can cause a caller-supplied character sequence to alter a regular-expression predicate generated by an affected application. An authenticated user who can influence such a value may cause the application to return records beyond those intended by the original filter.",
  "id": "CVE-2026-88026",
  "modified": "2026-10-01T03:30:52.243602383Z",
  "published": "2026-09-10T17:48:39.431Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://jira.mongodb.org/browse/CSHARP-6177"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88026.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-88026"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Regular expression injection via unescaped characters in LINQ query translation in MongoDB C# Driver"
}