{"id":"CVE-2026-125118","state":"PUBLISHED","title":"Mongoose: Prototype pollution via Schema.prototype.virtual()","description":"Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment. Prior to 6.13.12, 7.8.13, 8.24.7, and 9.11.4, Schema.prototype.virtual() builds nested virtual paths without applying the special-property validation already used by Schema.path() and Schema.add(). An attacker who can influence virtual field names in dynamic schemas, content-management form builders, or schema-as-code systems can supply path segments such as __proto__, constructor, or prototype, causing the virtual-path reducer to write enumerable properties to Object.prototype or Function.prototype. The resulting prototype pollution can spoof inherited property checks such as authorization flags and can provide function-prototype gadget state to other server-side JavaScript code. This issue is fixed in versions 6.13.12, 7.8.13, 8.24.7, and 9.11.4.","publishedAt":"2026-11-09T22:29:55.070Z","updatedAt":"2026-11-09T22:29:55.070Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["Automattic mongoose"],"affected":[{"vendor":"Automattic","product":"mongoose","versions":[{"version":"< 6.13.12","status":"affected"},{"version":">= 7.0.0, < 7.8.13","status":"affected"},{"version":">= 8.0.0, < 8.24.7","status":"affected"},{"version":">= 9.0.0, < 9.11.4","status":"affected"}]}],"references":["https://github.com/Automattic/mongoose/security/advisories/GHSA-6972-9mcm-vhwj","https://github.com/Automattic/mongoose/commit/318f7e09dd363a1dfddb8180878488dccd2796d1","https://github.com/Automattic/mongoose/commit/74df7769b5a8d89c4413b764029911ee915ea467","https://github.com/Automattic/mongoose/commit/7a2a6567abbb72c0430c8cc5b7942141844fecff","https://github.com/Automattic/mongoose/commit/fb467e6d33174293dc0360649f20ce68d99117a9","https://github.com/Automattic/mongoose/releases/tag/6.13.12","https://github.com/Automattic/mongoose/releases/tag/7.8.13","https://github.com/Automattic/mongoose/releases/tag/8.24.7","https://github.com/Automattic/mongoose/releases/tag/9.11.4"],"weaknesses":["CWE-1321"],"ingestedAt":"2026-11-09T22:40:07.100Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/125xxx/CVE-2026-125118.json","commit":"fdb3e83d366db6feee422cdb902b3ae06cdb792f","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-125118","state":"PUBLISHED","datePublished":"2026-11-09T22:29:55.070Z","dateUpdated":"2026-11-09T22:29:55.070Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-11-09T17:45:35.936Z"},"containers":{"cna":{"title":"Mongoose: Prototype pollution via Schema.prototype.virtual()","descriptions":[{"lang":"en","value":"Mongoose is a MongoDB object modeling tool designed to work in an asynchronous environment. Prior to 6.13.12, 7.8.13, 8.24.7, and 9.11.4, Schema.prototype.virtual() builds nested virtual paths without applying the special-property validation already used by Schema.path() and Schema.add(). An attacker who can influence virtual field names in dynamic schemas, content-management form builders, or schema-as-code systems can supply path segments such as __proto__, constructor, or prototype, causing the virtual-path reducer to write enumerable properties to Object.prototype or Function.prototype. The resulting prototype pollution can spoof inherited property checks such as authorization flags and can provide function-prototype gadget state to other server-side JavaScript code. This issue is fixed in versions 6.13.12, 7.8.13, 8.24.7, and 9.11.4."}],"affected":[{"vendor":"Automattic","product":"mongoose","versions":[{"version":"< 6.13.12","status":"affected"},{"version":">= 7.0.0, < 7.8.13","status":"affected"},{"version":">= 8.0.0, < 8.24.7","status":"affected"},{"version":">= 9.0.0, < 9.11.4","status":"affected"}]}],"references":[{"url":"https://github.com/Automattic/mongoose/security/advisories/GHSA-6972-9mcm-vhwj","name":"https://github.com/Automattic/mongoose/security/advisories/GHSA-6972-9mcm-vhwj","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/Automattic/mongoose/commit/318f7e09dd363a1dfddb8180878488dccd2796d1","name":"https://github.com/Automattic/mongoose/commit/318f7e09dd363a1dfddb8180878488dccd2796d1","tags":["x_refsource_MISC"]},{"url":"https://github.com/Automattic/mongoose/commit/74df7769b5a8d89c4413b764029911ee915ea467","name":"https://github.com/Automattic/mongoose/commit/74df7769b5a8d89c4413b764029911ee915ea467","tags":["x_refsource_MISC"]},{"url":"https://github.com/Automattic/mongoose/commit/7a2a6567abbb72c0430c8cc5b7942141844fecff","name":"https://github.com/Automattic/mongoose/commit/7a2a6567abbb72c0430c8cc5b7942141844fecff","tags":["x_refsource_MISC"]},{"url":"https://github.com/Automattic/mongoose/commit/fb467e6d33174293dc0360649f20ce68d99117a9","name":"https://github.com/Automattic/mongoose/commit/fb467e6d33174293dc0360649f20ce68d99117a9","tags":["x_refsource_MISC"]},{"url":"https://github.com/Automattic/mongoose/releases/tag/6.13.12","name":"https://github.com/Automattic/mongoose/releases/tag/6.13.12","tags":["x_refsource_MISC"]},{"url":"https://github.com/Automattic/mongoose/releases/tag/7.8.13","name":"https://github.com/Automattic/mongoose/releases/tag/7.8.13","tags":["x_refsource_MISC"]},{"url":"https://github.com/Automattic/mongoose/releases/tag/8.24.7","name":"https://github.com/Automattic/mongoose/releases/tag/8.24.7","tags":["x_refsource_MISC"]},{"url":"https://github.com/Automattic/mongoose/releases/tag/9.11.4","name":"https://github.com/Automattic/mongoose/releases/tag/9.11.4","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1321","lang":"en","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-11-09T22:29:55.070Z"},"source":{"advisory":"GHSA-6972-9mcm-vhwj","discovery":"UNKNOWN"}}}}}