Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') Affecting node-js-yaml package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-DEBIAN12-NODEJSYAML-13961715
- published14 Nov 2025
- disclosed13 Nov 2025
Introduced: 13 Nov 2025
NewCVE-2025-64718 (opens in a new tab)How to fix?
There is no fixed version for Debian:12 node-js-yaml.
NVD Description
Note: Versions mentioned in the description apply only to the upstream node-js-yaml package and not the node-js-yaml package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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).