CVE-2025-54803 HIGH

CVE-2025-54803: js-toml is vulnerable to Prototype Pollution

Vendor Sunnyadn
Product js-toml
Weakness CWE-1321
Published August 5, 2025
Last update August 5, 2025

CVSS base score

7.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS 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

What the vulnerability does

01Description

js-toml is a TOML parser for JavaScript, fully compliant with the TOML 1.0.0 Spec. In versions below 1.0.2, a prototype pollution vulnerability in js-toml allows a remote attacker to add or modify properties of the global Object.prototype by parsing a maliciously crafted TOML input. This is fixed in version 1.0.2.

Key dates

02Disclosure timeline

August 5, 2025 CVE published
August 5, 2025 Record updated