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CVE-2026-93759

Server-side JavaScript injection via string query criteria bypassing the strict operator allowlist

CVSS 4.0 8.8 HIGHCVSS 3.1 8.6 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-93759

Published

Mongoid does not neutralize a string-typed query criterion supplied to its query builder, and instead passes it to the database as a server-side JavaScript expression. An unauthenticated party able to influence the value an application supplies as a query argument may cause code of their choosing to be evaluated by the database engine. This may result in unintended disclosure of stored field values, unintended selection of documents for application-initiated writes, and reduced database performance.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-93759

Published

Mongoid

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "MongoDB Inc.",
                    "product": "Mongoid",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "9.1.0",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "9.0.0",
                            "lessThanOrEqual": "9.0.11",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "8.1.0",
                            "lessThanOrEqual": "8.1.12",
                            "versionType": "semver"
                        },
                        {
                            "status": "affected",
                            "version": "8.0.0",
                            "lessThanOrEqual": "8.0.12",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON