Immutable.js is a JavaScript library providing immutable data structures for functional programming patterns, with a narrow and focused product scope. Treat this as a compact vendor profile; current severity, exploitation, and exposure counts are shown alongside this summary.
The number and severity of CVEs published that impact products developed by Immutable Js over time
Signals from CVEs in this vendor scope (3 CVEs).
3 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2026-29063CRITICAL 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(), mergeD | Mar 6, 2026 | 9.8 | 38 | NO | NO |
CVE-2026-59879HIGH Immutable.js provides many Persistent Immutable data structures. Prior to 4.3.9 and 5.1.8, List#set, List#setSize, List#setIn, List#updateIn, and the functional set, setIn, and upd | Jul 8, 2026 | 7.5 | 34 | NO | NO |
CVE-2026-59880HIGH Immutable.js provides many Persistent Immutable data structures. Prior to 4.3.9 and 5.1.8, Immutable.Map and Immutable.Set keep keys that share the same 32-bit hash in a HashCollis | Jul 8, 2026 | 7.5 | 33 | NO | NO |
Signals from CVEs in this vendor scope (3 CVEs).
An overview of all social media posts that mention a CVE ID that affects a product developed by Immutable Js.
Media articles that mention a CVE ID that affects a product developed by Immutable Js — matched by CVE ID, not by vendor name.