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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-64718 Detail

Description

js-yaml is a JavaScript YAML parser and dumper. In js-yaml before 4.1.1 and 3.14.2, it's possible for an attacker to modify the prototype of the result of a parsed yaml document via prototype pollution (`__proto__`). All users who parse untrusted yaml documents may be impacted. The problem is patched in js-yaml 4.1.1 and 3.14.2. Users can protect against this kind of attack on the server by using `node --disable-proto=delete` or `deno` (in Deno, pollution protection is on by default).


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/advisories/GHSA-mh29-5h37-fv8m CVE Vendor Advisory 
https://github.com/nodeca/js-yaml/commit/383665ff4248ec2192d1274e934462bb30426879 GitHub, Inc. Patch 
https://github.com/nodeca/js-yaml/commit/5278870a17454fe8621dbd8c445c412529525266 GitHub, Inc. Patch 
https://github.com/nodeca/js-yaml/issues/730#issuecomment-3549635876 GitHub, Inc. Issue Tracking 
https://github.com/nodeca/js-yaml/security/advisories/GHSA-mh29-5h37-fv8m GitHub, Inc. Vendor Advisory 

Weakness Enumeration

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

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-64718
NVD Published Date:
11/13/2025
NVD Last Modified:
02/02/2026
Source:
GitHub, Inc.