7.9
High
CVE-2025-57820 Svelte devalue is a utility library
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
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| devalue 5.3 | earliest → < 5.3.2 | 5.3.2 |
Other CVEs of devalue
The 16 CVEs of devalue →
CVE-2026-123569
Devalue before 5.6.3 Denial of Service via Sparse Array Serialization
8.7
High
CVE-2026-123568
Sveltejs devalue before 5.6.3 Prototype Pollution via uneval Output
2.1
Low
CVE-2026-123566
Devalue before 5.9.3 CPU Amplification Denial of Service via uneval
8.7
High
CVE-2026-123567
Sveltejs devalue before 5.6.4 Prototype Injection via parse and unflatten
6.3
Medium