{"cve":"CVE-2025-57820","nvd":{"published":"2025-08-26T23:15:35.730","modified":"2026-06-17T09:43:29.903","status":"Deferred","description":"Svelte devalue is a utility library. Prior to version 5.3.2, a string passed to devalue.parse could represent an object with a __proto__ property and devalue.parse does not check that an index is numeric. This could result in assigning prototypes to objects and properties, leading to prototype pollution. This issue has been fixed in version 5.3.2","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H","score":7.9},"cvss_v3":null,"cwes":["CWE-1321"],"references":["https://github.com/sveltejs/devalue/commit/0623a47c9555b639c03ff1baea82951b2d9d1132","https://github.com/sveltejs/devalue/security/advisories/GHSA-vj54-72f3-p5jv"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:07:46.309729541+00:00"},"epss":{"cve":"CVE-2025-57820","score":0.00369,"percentile":0.30871,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-vj54-72f3-p5jv","url":"https://osv.dev/vulnerability/GHSA-vj54-72f3-p5jv","summary":"devalue prototype pollution vulnerability","modified":"2025-08-27T14:27:08Z","packages":[{"ecosystem":"npm","name":"devalue","purl":"pkg:npm/devalue","ranges":["<5.3.2"],"fixed":["5.3.2"]}]}],"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."]}