Improperly Controlled Modification of Dynamically-Determined Object Attributes in devalue - CVE-2025-57820
Published: April 24, 2026
Vulnerability identifier: #VU127516
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-57820
CWE-ID: CWE-915
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Rich Harris
Affected software:
devalue
devalue
Detailed vulnerability description
The vulnerability allows a remote attacker to modify application behavior.
The vulnerability exists due to improper control of dynamically managed code resources in devalue.parse when parsing a crafted serialized payload. A remote attacker can supply input containing a __proto__ property to modify application behavior.
How to mitigate CVE-2025-57820
Install security update from vendor's website.