{"cve":"CVE-2026-59868","nvd":{"published":"2026-07-08T16:16:33.270","modified":"2026-10-25T20:10:00.147","status":"Analyzed","description":"js-yaml is a JavaScript YAML parser and dumper. From 5.0.0 before 5.2.0, when merge keys are enabled, js-yaml can spend quadratic CPU time parsing a document whose size grows only linearly when a chain of mappings uses merge keys where each mapping merges the previous one. This issue is fixed in version 5.2.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-770","CWE-407"],"references":["https://github.com/nodeca/js-yaml/commit/3105455b81dee69e0fd36e09ac0b2ccfdb54adc1","https://github.com/nodeca/js-yaml/releases/tag/5.2.0","https://github.com/nodeca/js-yaml/security/advisories/GHSA-g796-fgmg-93mv","https://github.com/nodeca/js-yaml/security/advisories/GHSA-g796-fgmg-93mv"],"products":["nodeca:js-yaml"],"source":"nvd","synced_at":"2026-10-25T23:44:34.550481224+00:00"},"epss":{"cve":"CVE-2026-59868","score":0.00644,"percentile":0.50571,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-g796-fgmg-93mv","url":"https://osv.dev/vulnerability/GHSA-g796-fgmg-93mv","summary":"js-yaml: YAML merge-key chains can force quadratic CPU consumption in js-yaml","modified":"2026-07-20T21:30:38.305649104Z","packages":[{"ecosystem":"npm","name":"js-yaml","purl":"pkg:npm/js-yaml","ranges":[">=5.0.0 <5.2.0"],"fixed":["5.2.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}