@std/toml Prototype Pollution in Node.js and Browser_CVE-2025-55195

7.3 / 10

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Description

@std/toml is the Deno Standard Library. Prior to version 1.0.9, an attacker can pollute the prototype chain in Node.js runtime and Browser when parsing untrusted TOML data, thus achieving Prototype Pollution (PP) vulnerability. This is because the library is merging an untrusted object with an empty object, which by default the empty object has the prototype chain. This issue has been patched in version 1.0.9.

Basic Information

ID CVE-2025-55195

Source GitHub_M

Published Aug 14, 2025 at 16:39

Affected Product

Vendor denoland

Product std

Version < 1.0.9

Affected Versions denoland std < 1.0.9

CWE Classification

CWE-1321

References

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    "published": "2025-08-14T16:39:28.158Z",
    "modified": "2025-08-14T16:39:28.158Z",
    "type": "cve",
    "title": "@std/toml Prototype Pollution in Node.js and Browser",
    "source": "GitHub_M",
    "references": "https://github.com/denoland/std/security/advisories/GHSA-crjp-8r9q-2j9r\nhttps://github.com/denoland/std/commit/540662cfd6d71e969af292aa604ef4049dbe271b\nhttps://github.com/denoland/std/releases/tag/release-2025.08.13",
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