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CVE-2025-64718

js-yaml has prototype pollution in merge (<<) PUBLISHED

Description (CNA)

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).

Affected (CNA)

Vendor / productVersions
nodeca / js-yamlaffected >= 4.0.0, < 4.1.1; affected < 3.14.2

CWE

CWE-1321

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

CVE

No English description supplied.