CVE-2025-54803CWE-1321

js-toml is vulnerable to Prototype Pollution

High · published August 5, 2025

CVSS v4.0
7.9
EPSS
1%
Percentile
41.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.9 · HIGH
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
EPSS
0.00500 · 41.9th percentile
Weakness
CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Published
2025-08-05T00:06Z
EPSS history
Timeline
  • 05 AUG 00:06Z
    js-toml is vulnerable to Prototype Pollution
    cvelistv5