CVE-2026-114655 (GCVE-0-2026-114655)

Vulnerability from cvelistv5 – Published: 2026-10-22 19:14 – Updated: 2026-10-22 20:38
VLAI
Title
KMS request injection via unsanitized key vault and provider values in libmongocrypt
Summary
libmongocrypt builds requests to external key management services (AWS, Azure and GCP) by inserting values from key vault documents, KMS provider configuration and KMS responses into request lines, headers and signed request bodies without validating or encoding them for each context. A user with write access to the key vault collection can alter the structure of these requests, including adding members to request bodies and token claims that the library then signs with the application's credentials. This may result in key management operations being performed with parameters the application did not intend.
Severity
6 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
CWE
  • CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Assigner
mongodb CNA under the mitre root
CNA scorecard C 70/100 over 219 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
MongoDB libmongocrypt Affected: 1.0.0 , < 1.21.1 (semver)
guessed Create a notification for this product.
Show details on NVD website
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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "libmongocrypt",
          "vendor": "MongoDB",
          "versions": [
            {
              "lessThan": "1.21.1",
              "status": "affected",
              "version": "1.0.0",
              "versionType": "semver"
            }
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      ],
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            }
          ],
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
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            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
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            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
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            "baseScore": 5.9,
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N",
            "version": "3.1"
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-74",
              "description": "CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component (\u0027Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-22T20:38:26.441Z",
        "orgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb",
        "shortName": "mongodb"
      },
      "references": [
        {
          "url": "https://jira.mongodb.org/browse/MONGOCRYPT-963"
        },
        {
          "url": "https://github.com/mongodb/libmongocrypt/releases/tag/1.21.1"
        },
        {
          "url": "https://github.com/mongodb/libmongocrypt/security/advisories/GHSA-7mvq-mg47-m88j"
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "KMS request injection via unsanitized key vault and provider values in libmongocrypt",
      "x_generator": {
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      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb",
    "assignerShortName": "mongodb",
    "cveId": "CVE-2026-114655",
    "datePublished": "2026-10-22T19:14:00.708Z",
    "dateReserved": "2026-10-21T21:57:57.844Z",
    "dateUpdated": "2026-10-22T20:38:26.441Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-114655",
      "date": "2026-10-26",
      "epss": "0.00267",
      "percentile": "0.18688"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
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                "defaultStatus": "unaffected",
                "product": "libmongocrypt",
                "vendor": "MongoDB",
                "versions": [
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                    "status": "affected",
                    "version": "1.0.0",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "source": "cna@mongodb.com"
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        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "libmongocrypt builds requests to external key management services (AWS, Azure and GCP) by inserting values from key vault documents, KMS provider configuration and KMS responses into request lines, headers and signed request bodies without validating or encoding them for each context. A user with write access to the key vault collection can alter the structure of these requests, including adding members to request bodies and token claims that the library then signs with the application\u0027s credentials. This may result in key management operations being performed with parameters the application did not intend."
          }
        ],
        "id": "CVE-2026-114655",
        "lastModified": "2026-10-23T19:45:03.547",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.9,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "LOW",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N",
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              "impactScore": 4.2,
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              "type": "Secondary"
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          "cvssMetricV40": [
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                "Recovery": "NOT_DEFINED",
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                "availabilityRequirement": "NOT_DEFINED",
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                "baseSeverity": "MEDIUM",
                "confidentialityRequirement": "NOT_DEFINED",
                "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": "LOW",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/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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                "vulnAvailabilityImpact": "NONE",
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                "vulnIntegrityImpact": "LOW",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
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            }
          ]
        },
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            "source": "cna@mongodb.com",
            "url": "https://github.com/mongodb/libmongocrypt/releases/tag/1.21.1"
          },
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            "source": "cna@mongodb.com",
            "url": "https://github.com/mongodb/libmongocrypt/security/advisories/GHSA-7mvq-mg47-m88j"
          },
          {
            "source": "cna@mongodb.com",
            "url": "https://jira.mongodb.org/browse/MONGOCRYPT-963"
          }
        ],
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        "vulnStatus": "Awaiting Analysis",
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            "source": "cna@mongodb.com",
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    }
  }
}



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