CVE-2025-64718

ADVISORY - github

Summary

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

EPSS Score⁠: 0.00019 (0.041)

Common Weakness Enumeration (CWE)

ADVISORY - nist

CWE-1321⁠

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

ADVISORY - github

CWE-1321⁠

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

ADVISORY - redhat

CWE-1321⁠

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Impacted images

Advisories

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