immutable (npm) — known CVEs & security advisories

Known CVE vulnerabilities and GitHub Security Advisories affecting the npm package immutable, with affected version ranges, CVSS severity, EPSS exploit prediction, and CISA KEV status.

CVEs (1)

• CVE-2026-29063 — CVSS 9.8 (critical): 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…