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CVE-2025-55195 Detail

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/denoland/std/commit/540662cfd6d71e969af292aa604ef4049dbe271b GitHub, Inc.
https://github.com/denoland/std/releases/tag/release-2025.08.13 GitHub, Inc.
https://github.com/denoland/std/security/advisories/GHSA-crjp-8r9q-2j9r CISA-ADP, GitHub, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') GitHub, Inc.  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-55195
NVD Published Date:
08/14/2025
NVD Last Modified:
08/15/2025
Source:
GitHub, Inc.