{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-114653", "assignerOrgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb", "state": "PUBLISHED", "assignerShortName": "mongodb", "dateReserved": "2026-10-21T21:57:54.563Z", "datePublished": "2026-10-22T19:13:58.414Z", "dateUpdated": "2026-10-22T21:25:36.721Z"}, "containers": {"cna": {"title": "Silent client-side encryption bypass via unescaped field-name regex in CSFLE schema builder", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-185", "description": "CWE-185: Incorrect Regular Expression", "type": "CWE"}]}], "affected": [{"vendor": "MongoDB", "product": "C# Driver", "versions": [{"status": "affected", "version": "3.5.0", "lessThan": "3.13.0", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "A client-side encryption schema construction component in the MongoDB C# Driver places caller-supplied field identifiers into a position that is interpreted as a pattern expression, without normalizing or validating them. As a result, an application that designates certain fields for client-side field-level encryption may have the protection silently fail to apply, so data intended to be encrypted is stored and returned in cleartext; conversely, the rule may apply more broadly than intended. No user action is required to cause the condition, and any party with ordinary read access to the stored data \u2014 without possession of the encryption keys \u2014 can observe the unprotected values.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "A client-side encryption schema construction component in the MongoDB C# Driver places caller-supplied field identifiers into a position that is interpreted as a pattern expression, without normalizing or validating them. As a result, an application that designates certain fields for client-side field-level encryption may have the protection silently fail to apply, so data intended to be encrypted is stored and returned in cleartext; conversely, the rule may apply more broadly than intended. No user action is required to cause the condition, and any party with ordinary read access to the stored data \u2014 without possession of the encryption keys \u2014 can observe the unprotected values."}]}], "references": [{"url": "https://jira.mongodb.org/browse/CSHARP-6174"}, {"url": "https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0"}, {"url": "https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-ggmm-wc43-vphh"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 7.1, "vectorString": "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"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE", "baseSeverity": "MEDIUM", "baseScore": 6.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"}}], "source": {"discovery": "INTERNAL"}, "x_generator": {"engine": "cve_record_builder.py"}, "providerMetadata": {"orgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb", "shortName": "mongodb", "dateUpdated": "2026-10-22T21:25:36.721Z"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "C# Driver", "vendor": "MongoDB", "versions": [{"lessThan": "3.13.0", "status": "affected", "version": "3.5.0", "versionType": "semver"}]}], "source": "cna@mongodb.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A client-side encryption schema construction component in the MongoDB C# Driver places caller-supplied field identifiers into a position that is interpreted as a pattern expression, without normalizing or validating them. As a result, an application that designates certain fields for client-side field-level encryption may have the protection silently fail to apply, so data intended to be encrypted is stored and returned in cleartext; conversely, the rule may apply more broadly than intended. No user action is required to cause the condition, and any party with ordinary read access to the stored data \u2014 without possession of the encryption keys \u2014 can observe the unprotected values."}], "id": "CVE-2026-114653", "lastModified": "2026-10-22T22:18:06.057", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "cna@mongodb.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.1, "baseSeverity": "HIGH", "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:N/PR:L/UI:N/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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@mongodb.com", "type": "Secondary"}]}, "published": "2026-10-22T19:17:39.307", "references": [{"source": "cna@mongodb.com", "url": "https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0"}, {"source": "cna@mongodb.com", "url": "https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-ggmm-wc43-vphh"}, {"source": "cna@mongodb.com", "url": "https://jira.mongodb.org/browse/CSHARP-6174"}], "sourceIdentifier": "cna@mongodb.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-185"}], "source": "cna@mongodb.com", "type": "Secondary"}]}

{}

{}