Svelte devalue vulnerable to prototype pollution_CVE-2025-57820

7.9 / 10

HIGH

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

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

Basic Information

ID CVE-2025-57820

Source GitHub_M

Published Aug 26, 2025 at 22:33

Affected Product

Vendor sveltejs

Product devalue

Version < 5.3.2

Affected Versions sveltejs devalue < 5.3.2

CWE Classification

CWE-1321

References

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    "published": "2025-08-26T22:33:19.100Z",
    "modified": "2025-08-26T22:33:19.100Z",
    "type": "cve",
    "title": "Svelte devalue vulnerable to prototype pollution",
    "source": "GitHub_M",
    "references": "https://github.com/sveltejs/devalue/security/advisories/GHSA-vj54-72f3-p5jv\nhttps://github.com/sveltejs/devalue/commit/0623a47c9555b639c03ff1baea82951b2d9d1132",
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