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CVE-2025-54803

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Date: August 4, 2025

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.

Severity Score

Related Resources (6)

https://nvd.nist.gov/vuln/detail/CVE-2025-54803
https://github.com/sunnyadn/js-toml/commit/b125910a3f094b744c9c3571360d4b9e3a472f66
https://github.com/sunnyadn/js-toml
https://gist.github.com/siunam321/f3dc4d21a5a932c67b6c11d0026f5afc
https://github.com/sunnyadn/js-toml/security/advisories/GHSA-65fc-cr5f-v7r2
https://www.mend.io/vulnerability-database/CVE-2025-54803

Severity Score

Weakness Type (CWE)

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

CWE-1321

Top Fix

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Upgrade to version js-toml - 1.0.2

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

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