{"id":"CVE-2025-64718","revision":"d5568d49423c4ab1a1b9bb2aba03ced6","records":[{"revision":"d5568d49423c4ab1a1b9bb2aba03ced6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-64718","aliases":[],"title":"js-yaml has prototype pollution in merge (<<)","description":"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).","state":0,"publishedAt":"2025-11-13T15:32:44.634+00:00","modifiedAt":"2026-01-29T22:08:30.431+00:00","affected":[{"ecosystem":"Vendor product","name":"js-yaml","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"nodeca\",\n                    \"product\": \"js-yaml\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 4.0.0, < 4.1.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"< 3.14.2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/nodeca/js-yaml/security/advisories/GHSA-mh29-5h37-fv8m","https://github.com/nodeca/js-yaml/issues/730#issuecomment-3549635876","https://github.com/nodeca/js-yaml/commit/383665ff4248ec2192d1274e934462bb30426879","https://github.com/nodeca/js-yaml/commit/5278870a17454fe8621dbd8c445c412529525266"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-64718","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-64718","identifiers":["CVE-2025-64718"]},"retained":false,"historicalAffected":[]}],"coverage":[]}