Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') Affecting gitlab-rails-ce-fips-19.1 package, versions <19.1.1-r1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.41% (34th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-GITLABRAILSCEFIPS191-17707200
  • published30 Jun 2026
  • 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 Chainguard gitlab-rails-ce-fips-19.1 to version 19.1.1-r1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gitlab-rails-ce-fips-19.1 package and not the gitlab-rails-ce-fips-19.1 package as distributed by Chainguard. See How to fix? for Chainguard 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