Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') Affecting rancher-api-ui package, versions <1.2.3-r6
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.
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 applicationsSnyk Learn
Learn about Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-CHAINGUARDLATEST-RANCHERAPIUI-15704154
- published20 Mar 2026
- disclosed6 Mar 2026
Introduced: 6 Mar 2026
NewCVE-2026-29063 (opens in a new tab)How to fix?
Upgrade Chainguard rancher-api-ui to version 1.2.3-r6 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream rancher-api-ui package and not the rancher-api-ui package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
Immutable.js provides many Persistent Immutable data structures. Prior to versions 3.8.3, 4.3.7, and 5.1.5, Prototype Pollution is possible in immutable via the mergeDeep(), mergeDeepWith(), merge(), Map.toJS(), and Map.toObject() APIs. This issue has been patched in versions 3.8.3, 4.3.7, and 5.1.5.