CVE-2026-84962

An unauthorized user with key vault write access may cause an authorized client to issue arbitrary authenticated Google Cloud KMS API calls under the authorized user's identity, escalating database-level access into cloud key control and defeating client-side encryption.

CVSS v3 4.2 MEDIUM

4.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.5 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required HIGH

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://jira.mongodb.org/browse/MONGOCRYPT-960	Vendor Advisory Permissions Required

Configurations

Configuration 1 (hide)

cpe:2.3:a:mongodb:libmongocrypt:*:*:*:*:*:*:*:*

History

17 Sep 2026, 14:00

Type	Values Removed	Values Added
CPE		cpe:2.3:a:mongodb:libmongocrypt::::::::
First Time		Mongodb Mongodb libmongocrypt
References	~~() https://jira.mongodb.org/browse/MONGOCRYPT-960 -~~	() https://jira.mongodb.org/browse/MONGOCRYPT-960 - Vendor Advisory, Permissions Required

Information

Published : 2026-09-03 16:18

Updated : 2026-09-17 14:00

NVD link : CVE-2026-84962

Mitre link : CVE-2026-84962

CVE.ORG link : CVE-2026-84962

JSON object : View

Products Affected

mongodb

libmongocrypt

CWE

CWE-93

Improper Neutralization of CRLF Sequences ('CRLF Injection')

{"id": "CVE-2026-84962", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-84962", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-03T15:32:38.247701Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cna@mongodb.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.2, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 0.5}], "cvssMetricV40": [{"type": "Secondary", "source": "cna@mongodb.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.7, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:H/VI:N/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "cna@mongodb.com", "affectedData": [{"vendor": "MongoDB", "product": "libmongocrypt", "versions": [{"status": "affected", "version": "0", "lessThan": "1.20.2", "versionType": "semver"}], "defaultStatus": "unaffected"}]}], "published": "2026-09-03T16:18:24.967", "references": [{"url": "https://jira.mongodb.org/browse/MONGOCRYPT-960", "tags": ["Vendor Advisory", "Permissions Required"], "source": "cna@mongodb.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "cna@mongodb.com", "description": [{"lang": "en", "value": "CWE-93"}]}], "descriptions": [{"lang": "en", "value": "An unauthorized user with key vault write access may cause an authorized client to issue arbitrary authenticated Google Cloud KMS API calls under the authorized user's identity, escalating database-level access into cloud key control and defeating client-side encryption."}], "lastModified": "2026-09-17T14:00:40.680", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:mongodb:libmongocrypt:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2CB34549-A4E5-449A-A5FD-E1BDE233F4FE", "versionEndExcluding": "1.20.2"}], "operator": "OR"}]}], "sourceIdentifier": "cna@mongodb.com"}