{"answers":{"affected":"4 open source packages ship an affected version, including mongoose.","exploited":"There is no known exploitation of CVE-2026-125118 in the wild and no public exploit code.","exposure":"","fix":"Upgrade mongoose to a fixed version for your release line: 6.13.12, 7.8.13, 8.24.7 or 9.11.4.","what":"CVE-2026-125118 is a medium-severity vulnerability in Automattic mongoose, published on 9 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-125118 and fix it if it is affected.\n\nWhat it is: CVE-2026-125118 is a medium-severity vulnerability in Automattic mongoose, published on 9 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-125118 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- mongoose (npm): affected all versions; fixed in 6.13.12\n- mongoose (npm): affected from 7.0.0; fixed in 7.8.13\n- mongoose (npm): affected from 8.0.0; fixed in 8.24.7\n- mongoose (npm): affected from 9.0.0; fixed in 9.11.4\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-125118/ (Markdown: https://insights.sbomify.com/CVE-2026-125118/index.md)","id":"CVE-2026-125118","markdown":"https://insights.sbomify.com/CVE-2026-125118/index.md","name":"CVE-2026-125118","record":{"aliases":["GHSA-6972-9mcm-vhwj"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"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.","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Mongoose: Prototype pollution via Schema.prototype.virtual()","id":"CVE-2026-125118","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":4,"n_references":9,"next":{"headline":"Mongoose: Connection-level sanitizeFilter not applied","id":"CVE-2026-125119"},"nickname":null,"packages":[{"ecosystem":"npm","fixed":["6.13.12"],"introduced":["0"],"last_affected":[],"package":"mongoose","purl":null,"source":"GHSA-6972-9mcm-vhwj"},{"ecosystem":"npm","fixed":["7.8.13"],"introduced":["7.0.0"],"last_affected":[],"package":"mongoose","purl":null,"source":"GHSA-6972-9mcm-vhwj"},{"ecosystem":"npm","fixed":["8.24.7"],"introduced":["8.0.0"],"last_affected":[],"package":"mongoose","purl":null,"source":"GHSA-6972-9mcm-vhwj"},{"ecosystem":"npm","fixed":["9.11.4"],"introduced":["9.0.0"],"last_affected":[],"package":"mongoose","purl":null,"source":"GHSA-6972-9mcm-vhwj"}],"prev":{"headline":"Mongoose walks into inherited properties when hydrating, setting, and merging, allowing overwrites of built-in functions (denial of service) and shared schema state","id":"CVE-2026-125117"},"products":["mongoose"],"published":"2026-11-09","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-11-09","vendors":["Automattic"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-125118/"}