Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') Affecting kibana-9.1-config package, versions <9.1.8-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.02% (5th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-MINIMOSLATEST-KIBANA91CONFIG-14048587
  • published19 Nov 2025
  • disclosed13 Nov 2025

Introduced: 13 Nov 2025

CVE-2025-64718  (opens in a new tab)
CWE-1321  (opens in a new tab)

How to fix?

Upgrade Minimos:latest kibana-9.1-config to version 9.1.8-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kibana-9.1-config package and not the kibana-9.1-config package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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).

CVSS Base Scores

version 3.1