CVE-2026-118581 (GCVE-0-2026-118581)

Vulnerability from cvelistv5 – Published: 2026-10-28 16:51 – Updated: 2026-10-28 16:51
VLAI
Title
NoSQL injection via mismatched BSON size prefix in raw document splice to the wire protocol
Summary
A BSON encoding component of the MongoDB Java Driver does not verify that an externally supplied raw document's self-declared length agrees with the extent of the byte range it is given before that range is copied into an outgoing database command. An application that wraps untrusted raw bytes in such a document and uses it as part of a command can therefore emit a structurally inconsistent message, causing the database to interpret attacker-supplied trailing content as additional fields of the surrounding command. No authentication to the driver or database is required beyond the ability to influence those bytes through the victim application, and no user interaction is needed. The result is unintended modification of the command actually executed, which can alter the data read or written under the application's credentials.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE
  • CWE-943 - Improper Neutralization of Special Elements in Data Query Logic
Assigner
mongodb CNA under the mitre root
CNA scorecard C 70/100 over 222 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
MongoDB Java Driver Affected: 5.8.0 , < 5.14.0 (semver)
guessed Create a notification for this product.
Show details on NVD website
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{
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          "vendor": "MongoDB",
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            }
          ],
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        }
      ],
      "metrics": [
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            "Recovery": "NOT_DEFINED",
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            "baseScore": 6.5,
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            "confidentialityImpact": "LOW",
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            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
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      "problemTypes": [
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          "descriptions": [
            {
              "cweId": "CWE-943",
              "description": "CWE-943: Improper Neutralization of Special Elements in Data Query Logic",
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              "type": "CWE"
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          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-28T16:51:21.960Z",
        "orgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb",
        "shortName": "mongodb"
      },
      "references": [
        {
          "url": "https://github.com/mongodb/mongo-java-driver/releases/tag/r5.14.0"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "NoSQL injection via mismatched BSON size prefix in raw document splice to the wire protocol",
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  "cveMetadata": {
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    "assignerShortName": "mongodb",
    "cveId": "CVE-2026-118581",
    "datePublished": "2026-10-28T16:51:21.960Z",
    "dateReserved": "2026-10-28T16:00:23.372Z",
    "dateUpdated": "2026-10-28T16:51:21.960Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-10-30",
      "epss": "0.00192",
      "percentile": "0.0888"
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    "nvd": {
      "cve": {
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                "vendor": "MongoDB",
                "versions": [
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                    "status": "affected",
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            "source": "cna@mongodb.com"
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        "descriptions": [
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            "value": "A BSON encoding component of the MongoDB Java Driver does not verify that an externally supplied raw document\u0027s self-declared length agrees with the extent of the byte range it is given before that range is copied into an outgoing database command. An application that wraps untrusted raw bytes in such a document and uses it as part of a command can therefore emit a structurally inconsistent message, causing the database to interpret attacker-supplied trailing content as additional fields of the surrounding command. No authentication to the driver or database is required beyond the ability to influence those bytes through the victim application, and no user interaction is needed. The result is unintended modification of the command actually executed, which can alter the data read or written under the application\u0027s credentials."
          }
        ],
        "id": "CVE-2026-118581",
        "lastModified": "2026-10-29T15:04:37.187",
        "metrics": {
          "cvssMetricV31": [
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              "cvssData": {
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                "attackVector": "NETWORK",
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                "Recovery": "NOT_DEFINED",
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                "exploitMaturity": "NOT_DEFINED",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/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",
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                "vulnIntegrityImpact": "LOW",
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              "type": "Secondary"
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        "published": "2026-10-28T17:18:26.927",
        "references": [
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            "source": "cna@mongodb.com",
            "url": "https://github.com/mongodb/mongo-java-driver/releases/tag/r5.14.0"
          }
        ],
        "sourceIdentifier": "cna@mongodb.com",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
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            "description": [
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                "lang": "en",
                "value": "CWE-943"
              }
            ],
            "source": "cna@mongodb.com",
            "type": "Secondary"
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    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-30T00:29:41+00:00",
      "cve": "CVE-2026-118581",
      "id": "CVE-2026-118581",
      "initial_release_date": "2026-10-28T16:51:21.960000+00:00",
      "product_status:known_affected": "5",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "org.mongodb/bson: MongoDB Java Driver: Unintended command modification via improper BSON document length validation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-118581.json",
      "version": "3"
    }
  }
}



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