CVE-2025-64718

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).

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:nodeca:js-yaml::::::node.js::*
	cpe:2.3:a:nodeca:js-yaml::::::node.js::*

History

No history.

Information

Published : 2025-11-13 16:15

Updated : 2026-02-02 12:54

NVD link : CVE-2025-64718

Mitre link : CVE-2025-64718

CVE.ORG link : CVE-2025-64718

JSON object : View

Products Affected

nodeca

js-yaml

CWE

CWE-1321

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

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