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@renovate renovate bot commented Nov 14, 2025

This PR contains the following updates:

Package Change Age Confidence
js-yaml 4.1.0 -> 4.1.1 age confidence

GitHub Vulnerability Alerts

CVE-2025-64718

Impact

In js-yaml 4.1.0, 4.0.0, and 3.14.1 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.

Patches

Problem is patched in js-yaml 4.1.1 and 3.14.2.

Workarounds

You 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).

References

https://cheatsheetseries.owasp.org/cheatsheets/Prototype_Pollution_Prevention_Cheat_Sheet.html


Release Notes

nodeca/js-yaml (js-yaml)

v4.1.1

Compare Source

Security
  • Fix prototype pollution issue in yaml merge (<<) operator.

Configuration

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🚦 Automerge: Enabled.

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This PR was generated by Mend Renovate. View the repository job log.

@renovate renovate bot added the dependency Includes dependency fixes label Nov 14, 2025
@renovate renovate bot force-pushed the renovate/npm-js-yaml-vulnerability branch from cf8d661 to 96f948c Compare November 18, 2025 23:48
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