node-immutable: Immutable.js provides many Persistent Immutable data structures
CVE-2026-29063 is fixed in node-immutable on 1 platform by DEBIAN-CVE-2026-29063 (version 4.3.8-1), released March 6, 2026. It is not reported as exploited. Patch Radar priority: Urgent.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| node-immutable · Debian 14 | 4.3.8-1 | DEBIAN-CVE-2026-29063 | Mar 6, 2026 |
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