CVE-2025-55195

Published: Aug 14, 2025Modified: Jun 17, 2026Deferred

7.3

Vector

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

Exploitability: 3.9 / Impact: 3.4

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-1321

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

The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.

References (4)

https://github.com/denoland/std/commit/540662cfd6d71e969af292aa604ef4049dbe271b

Source: security-advisories@github.com

https://github.com/denoland/std/releases/tag/release-2025.08.13

Source: security-advisories@github.com

https://github.com/denoland/std/security/advisories/GHSA-crjp-8r9q-2j9r

Source: security-advisories@github.com

https://github.com/denoland/std/security/advisories/GHSA-crjp-8r9q-2j9r

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.