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).

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64718.json",
    "cwe_ids": [
        "CWE-1321"
    ],
    "cna_assigner": "GitHub_M"
}

References

Affected packages

Git / github.com/nodeca/js-yaml

Affected ranges

Type: GIT
Repo: https://github.com/nodeca/js-yaml
Events: Introduced

ee74ce4b4800282b2f23b776be7dc95dfe34db1c

Fixed

9963d366dfbde0c69722452bcd40b41e7e4160a0

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-64718.json"