Vulnerability Details CVE-2025-64718
js-yaml is a JavaScript YAML parser and dumper. In js-yaml 4.1.0 and below, 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. 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).
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 1.6%
CVSS Severity
CVSS v3 Score 5.3
References
Products affected by CVE-2025-64718
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cpe:2.3:a:nodeca:js-yaml:0.1.0
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cpe:2.3:a:nodeca:js-yaml:0.2.0
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cpe:2.3:a:nodeca:js-yaml:0.2.1
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cpe:2.3:a:nodeca:js-yaml:0.2.2
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cpe:2.3:a:nodeca:js-yaml:0.3.0
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cpe:2.3:a:nodeca:js-yaml:0.3.1
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cpe:2.3:a:nodeca:js-yaml:0.3.2
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cpe:2.3:a:nodeca:js-yaml:0.3.3
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cpe:2.3:a:nodeca:js-yaml:0.3.4
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cpe:2.3:a:nodeca:js-yaml:0.3.5
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cpe:2.3:a:nodeca:js-yaml:0.3.6
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cpe:2.3:a:nodeca:js-yaml:0.3.7
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cpe:2.3:a:nodeca:js-yaml:1.0.0
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cpe:2.3:a:nodeca:js-yaml:1.0.1
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cpe:2.3:a:nodeca:js-yaml:1.0.2
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cpe:2.3:a:nodeca:js-yaml:1.0.3
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cpe:2.3:a:nodeca:js-yaml:2.0.0
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cpe:2.3:a:nodeca:js-yaml:2.0.1
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cpe:2.3:a:nodeca:js-yaml:2.0.2
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cpe:2.3:a:nodeca:js-yaml:2.0.3
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cpe:2.3:a:nodeca:js-yaml:2.0.4
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cpe:2.3:a:nodeca:js-yaml:2.0.5
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cpe:2.3:a:nodeca:js-yaml:2.1.0
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cpe:2.3:a:nodeca:js-yaml:2.1.1
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cpe:2.3:a:nodeca:js-yaml:2.1.2
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cpe:2.3:a:nodeca:js-yaml:2.1.3
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cpe:2.3:a:nodeca:js-yaml:3.0.0
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cpe:2.3:a:nodeca:js-yaml:3.0.1
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cpe:2.3:a:nodeca:js-yaml:3.0.2
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cpe:2.3:a:nodeca:js-yaml:3.1.0
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cpe:2.3:a:nodeca:js-yaml:3.10.0
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cpe:2.3:a:nodeca:js-yaml:3.11.0
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cpe:2.3:a:nodeca:js-yaml:3.12.0
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cpe:2.3:a:nodeca:js-yaml:3.12.1
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cpe:2.3:a:nodeca:js-yaml:3.12.2
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cpe:2.3:a:nodeca:js-yaml:3.13.0
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cpe:2.3:a:nodeca:js-yaml:3.13.1
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cpe:2.3:a:nodeca:js-yaml:3.14.0
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cpe:2.3:a:nodeca:js-yaml:3.14.1
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cpe:2.3:a:nodeca:js-yaml:3.14.2
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cpe:2.3:a:nodeca:js-yaml:3.2.0
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cpe:2.3:a:nodeca:js-yaml:3.2.1
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cpe:2.3:a:nodeca:js-yaml:3.2.2
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cpe:2.3:a:nodeca:js-yaml:3.2.3
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cpe:2.3:a:nodeca:js-yaml:3.2.4
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cpe:2.3:a:nodeca:js-yaml:3.2.5
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cpe:2.3:a:nodeca:js-yaml:3.2.6
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cpe:2.3:a:nodeca:js-yaml:3.2.7
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cpe:2.3:a:nodeca:js-yaml:3.3.0
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cpe:2.3:a:nodeca:js-yaml:3.3.1
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cpe:2.3:a:nodeca:js-yaml:3.4.0
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cpe:2.3:a:nodeca:js-yaml:3.4.1
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cpe:2.3:a:nodeca:js-yaml:3.4.2
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cpe:2.3:a:nodeca:js-yaml:3.4.3
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cpe:2.3:a:nodeca:js-yaml:3.4.4
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cpe:2.3:a:nodeca:js-yaml:3.4.5
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cpe:2.3:a:nodeca:js-yaml:3.4.6
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cpe:2.3:a:nodeca:js-yaml:3.5.0
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cpe:2.3:a:nodeca:js-yaml:3.5.1
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cpe:2.3:a:nodeca:js-yaml:3.5.2
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cpe:2.3:a:nodeca:js-yaml:3.5.3
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cpe:2.3:a:nodeca:js-yaml:3.5.4
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cpe:2.3:a:nodeca:js-yaml:3.5.5
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cpe:2.3:a:nodeca:js-yaml:3.6.0
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cpe:2.3:a:nodeca:js-yaml:3.6.1
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cpe:2.3:a:nodeca:js-yaml:3.7.0
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cpe:2.3:a:nodeca:js-yaml:3.8.0
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cpe:2.3:a:nodeca:js-yaml:3.8.1
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cpe:2.3:a:nodeca:js-yaml:3.8.2
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cpe:2.3:a:nodeca:js-yaml:3.8.3
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cpe:2.3:a:nodeca:js-yaml:3.8.4
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cpe:2.3:a:nodeca:js-yaml:3.9.0
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cpe:2.3:a:nodeca:js-yaml:3.9.1
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cpe:2.3:a:nodeca:js-yaml:4.0.0
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cpe:2.3:a:nodeca:js-yaml:4.1.0