{"cve":{"cve_id":"CVE-2025-64718","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.0037,"epss_percentile":0.28648,"epss_as_of":"2026-06-23","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).","published_at":"2025-11-13T15:32:44.634000Z","last_modified_at":null,"cvss_v3_score":5.3,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-1321"],"nvd_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"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:28:09.776931Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"L","value_label":"Low"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"nodeca","vendor_name":"nodeca","product_slug":"js-yaml","product_name":"js-yaml","version_start":"< 3.14.2","version_start_inclusive":true,"version_end":"< 3.14.2","version_end_inclusive":true,"cpe23_uri":"cve5:nodeca:js-yaml:< 3.14.2:< 3.14.2"},{"vendor_slug":"nodeca","vendor_name":"nodeca","product_slug":"js-yaml","product_name":"js-yaml","version_start":">= 4.0.0, < 4.1.1","version_start_inclusive":true,"version_end":">= 4.0.0, < 4.1.1","version_end_inclusive":true,"cpe23_uri":"cve5:nodeca:js-yaml:>= 4.0.0, < 4.1.1:>= 4.0.0, < 4.1.1"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/nodeca/js-yaml/security/advisories/GHSA-mh29-5h37-fv8m","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/nodeca/js-yaml/issues/730#issuecomment-3549635876","source_type":"MISC","tags":[]},{"url":"https://github.com/nodeca/js-yaml/commit/383665ff4248ec2192d1274e934462bb30426879","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/nodeca/js-yaml/commit/5278870a17454fe8621dbd8c445c412529525266","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2025-11-13T15:32:44.634000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:49:01.286368Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:49:01.286368Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:49:01.286368Z","label":"CVSS score revised","source":"cvelistv5"}]}