CVE-2025-57820

Svelte devalue vulnerable to prototype pollution

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

Category

7.9
CVSS
Severity: High
CVSS 4.0 •
EPSS 0.04%
Affected: sveltejs devalue
Published at:
Updated at:

References

Link Tags
https://github.com/sveltejs/devalue/security/advisories/GHSA-vj54-72f3-p5jv
https://github.com/sveltejs/devalue/commit/0623a47c9555b639c03ff1baea82951b2d9d1132

Frequently Asked Questions

What is the severity of CVE-2025-57820?
CVE-2025-57820 has been scored as a high severity vulnerability.
How to fix CVE-2025-57820?
To fix CVE-2025-57820, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-57820 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-57820 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-57820?
CVE-2025-57820 affects sveltejs devalue.
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