CVE-2026-29063

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.

Score
CVSS 3.1 9.8 Critical
Status
Modified - security-advisories@github.com
Published
2026-03-06
Last modified
2026-09-10
Weaknesses
CWE-1321, CWE-915

Affected products

References

 
 
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