{"id":"CVE-2025-64718","sourceIdentifier":"security-advisories@github.com","published":"2025-11-13T16:15:57.153","lastModified":"2026-10-07T21:10:00.200","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"js-yaml is a JavaScript YAML parser and dumper. In js-yaml before 4.1.1 and 3.14.2, it's possible for an attacker to modify the prototype of the result of a parsed yaml document via prototype pollution (`__proto__`). All users who parse untrusted yaml documents may be impacted. The problem is patched in js-yaml 4.1.1 and 3.14.2. Users can protect against this kind of attack on the server by using `node --disable-proto=delete` or `deno` (in Deno, pollution protection is on by default)."},{"lang":"es","value":"js-yaml es un analizador y volcador YAML de JavaScript. En js-yaml antes de 4.1.1 y 3.14.2, es posible para un atacante modificar el prototipo del resultado de un documento YAML analizado a través de la contaminación de prototipos ('__proto__'). Todos los usuarios que analizan documentos YAML no confiables pueden verse afectados. El problema está parcheado en js-yaml 4.1.1 y 3.14.2. Los usuarios pueden protegerse contra este tipo de ataque en el servidor usando 'node --disable-proto=delete' o 'deno' (en Deno, la protección contra la contaminación está activada por defecto)."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"nodeca","product":"js-yaml","versions":[{"version":">= 4.0.0, < 4.1.1","status":"affected"},{"version":"< 3.14.2","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2025-11-13T16:18:01.997938Z","id":"CVE-2025-64718","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-1321"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:nodeca:js-yaml:*:*:*:*:*:node.js:*:*","versionEndExcluding":"3.14.2","matchCriteriaId":"8CAC7EC0-C471-4811-A77C-2DD5B47C7F46"},{"vulnerable":true,"criteria":"cpe:2.3:a:nodeca:js-yaml:*:*:*:*:*:node.js:*:*","versionStartIncluding":"4.0.0","versionEndExcluding":"4.1.1","matchCriteriaId":"B56B6076-0668-4DDC-8B01-C48019081B13"}]}]}],"references":[{"url":"https://github.com/nodeca/js-yaml/commit/383665ff4248ec2192d1274e934462bb30426879","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/nodeca/js-yaml/commit/5278870a17454fe8621dbd8c445c412529525266","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/nodeca/js-yaml/issues/730#issuecomment-3549635876","source":"security-advisories@github.com","tags":["Issue Tracking"]},{"url":"https://github.com/nodeca/js-yaml/security/advisories/GHSA-mh29-5h37-fv8m","source":"security-advisories@github.com","tags":["Vendor Advisory"]},{"url":"https://github.com/advisories/GHSA-mh29-5h37-fv8m","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"]}]}